Frequently Asked Questions
Get answers to the most common questions about red light therapy, treatment benefits, safety, recovery, usage, setup, and overall wellness results.
General Red Light Therapy Questions
What is red light therapy?
Red light therapy (RLT), also called photobiomodulation (PBM), is a non-invasive treatment that uses specific wavelengths of red and near-infrared light to stimulate natural processes inside your cells. Researchers believe these wavelengths help support cellular energy production, which may contribute to skin health, tissue repair, muscle recovery, and other biological functions. While some uses are supported by strong research, others are still being studied, so it’s important to separate evidence-based benefits from marketing claims.
How does red light therapy work?
Red light therapy works by delivering specific wavelengths of red and near-infrared light to your body’s tissues. These wavelengths are absorbed by mitochondria, the structures inside cells responsible for producing energy (ATP). Researches believe this process may help support tissue repair, reduce inflammation, and improve cellular function. Results depend on factors like wavelength, dose, treatment consistency, and the condition being treated.
Does red light therapy actually work?
Yes, but not for every claim you see online. Research provides the strongest evidence for certain skin concerns, pattern hair loss, and some types of pain and muscle recovery. For other popular claims, such as weigh loss or treating chronic diseases, the evidence is limited or mixed. Like many therapies, results depend on using an appropriate device, following evidence-based treatment protocols, and having realistic expectations.
What is photobiomodulation (PBM)?
Photobiomodulation (PBM) is the scientific term for red light therapy. It refers to the use of specific wavelengths of red and near-infrared light to stimulate biological processes within cells without generating significant heat. While “red light therapy” is the term most consumers recognize, researchers and healthcare professionals often use “photobiomodulation” in scientific literature because it more accurately describes how light influences cellular function.
Is red light therapy backed by science?
Yes. Red light therapy has been studied for decades, with thousands of published laboratory and human studies investigating its effects. The evidence is strongest for certain applications, including skin rejuvenation, pattern hair loss, oral mucositis, and some types of pain and muscle recovery. However, research for other claimed benefits is still developing, so not every marketing claim is supported by high-quality clinical evidence.
What conditions has red light therapy been studied for?
Researchers have studied red light therapy for a wide range of health and wellness applications, including skin aging, acne, wound healing, pattern hair loss, muscle recovery, joint pain, oral mucositis, and certain inflammatory conditions. While some of these uses are supported by multiple clinical studies, others have limited or mixed evidence. The quality of research varies depending on the condition, which is why it’s important to evaluate each claim individually.
What can't red light therapy do?
Red light therapy is not a cure-all. Despite some marketing claims, current evidence does not support using it as a standalone treatment for conditions such as cancer, significant weight loss, or serious chronic diseases. It also shouldn’t replace medical care or treatments recommended by your healthcare provider. While research continues to expand, it’s important to distinguish between evidence-supported uses and claims that have yet to be proven.
Is red light therapy safe?
For most healthy adults, red light therapy is generally considered safe when used as directed. It is non-invasive, does not use ultraviolet (UV) radiation, and is typically well tolerated. Reported side effects are uncommon and usually mild, such as temporary redness, eye discomfort from improper eye protection, or skin irritation. If you have a medical condition, are pregnant, or take medications that increase light sensitivity, consult your healthcare provider before beginning treatment.
Does red light therapy hurt?
No. Red light therapy is painless, and most people feel little to no sensation during treatment. Some devices may produce mild warmth, but properly designed red light therapy is considered non-thermal, meaning its effects are not caused by heat. If you experience pain or significant discomfort, stop using the device and review the manufacturer’s instructions or consult your healthcare provider.
Does red light therapy emit UV light?
No. Red light therapy uses visible red light and near-infrared light, not ultraviolet (UV) radiation. Unlike sunlight or tanning beds, it does not expose your skin to the UV wavelengths responsible for sunburn, premature skin aging, or increased skin cancer risk.
Can red light therapy cause cancer?
Current evidence does not suggest that red light therapy causes cancer. Because it does not emit UV radiation, it does not carry the same DNA-damaging risks associated with excessive sun exposure or tanning beds. However, if you have active cancer, a history of skin cancer, or a suspicious skin lesion, you should consult your healthcare provider before using red light therapy.
Is red light therapy FDA approved?
Some red light therapy devices are FDA cleared, while relatively few are FDA approved. FDA clearance means a device has been found substantially equivalent to another legally marketed device for a specific intended use. It does not mean the FDA has evaluated or approved every marketing claim associated with the device. Understanding the difference can help you make more informed purchasing decisions.
Is red light therapy the same as infrared therapy?
Not exactly. Red light therapy often uses both visible red light and near-infrared (NIR) light, but they are different parts of the light spectrum. Red light primarily affects tissues closer to the skin’s surface, while near-infrared light penetrates deeper into muscles, joints, and other tissues. Many modern devices combine both wavelengths to target multiple tissue depths in a single treatment.
Can red light therapy replace medical treatment?
No. Red light therapy may complement certain medical treatments, but it should not replace therapies recommended by your healthcare provider. While research supports its use for some conditions, it is best viewed as a supportive therapy rather than a cure or substitute for evidence-based medical care.
How Red Light Therapy Works
How does red light interact with your cells?
Red light therapy works by delivering specific wavelengths of red and near-infrared light into the body’s tissues. These wavelengths are absorbed by light-sensitive molecules inside cells, where they trigger biological processes that researchers believe support cellular function and repair. Rather than changing your cells, red light helps stimulate natural processes that are already occurring, which is why it’s often described as supporting the body’s own healing and maintenance mechanisms.
Why are mitochondria important in red light therapy?
Mitochondria are often called the “powerhouses” of the cell because they produce most of the energy your body needs to function. Researchers believe mitochondria are one of the primary targets of red light therapy. When certain wavelengths of light are absorbed, they may help mitochondria work more efficiently, allowing cells to produce energy more effectively and support normal repair and maintenance processes.
What is ATP, and why does it matter?
ATP (adenosine triphosphate) is the primary energy molecule used by every cell in your body. Your cells rely on ATP to perform essential functions, from repairing tissue and building collagen to supporting muscle contraction and nerve signaling. One proposed mechanism of red light therapy is that it helps mitochondria produce ATP more efficiently, though the exact biological pathways remain under study.
What wavelengths are used in red light therapy?
Most red light therapy devices use wavelengths within the visible red (approximately 620–700 nanometers) and near-infrared (700–1,100 nanometers) portions of the light spectrum. However, not every wavelength has been studied equally. Consumer devices commonly use wavelengths around 660 nm for red light and 850 nm for near-infrared because they have been widely investigated for skin health, muscle recovery, and other applications.
Why are 660 nm and 850 nm so common?
The wavelengths 660 nanometers (red) and 850 nanometers (near-infrared) have become industry standards because they fall within ranges that have been extensively studied in photobiomodulation research. Red light around 660 nm is commonly used for skin-related applications, while near-infrared light around 850 nm penetrates deeper into tissue and is frequently used for muscles and joints. They’re popular because of the amount of supporting research—not because they’re the only effective wavelengths.
What is irradiance?
Irradiance measures how much light energy reaches a specific area over a given amount of time. In red light therapy, it’s typically expressed in milliwatts per square centimeter (mW/cm²). Irradiance helps determine how quickly a device can deliver an effective treatment dose. Higher irradiance isn’t automatically better, however, because treatment time and distance also affect the total amount of light your tissues receive.
What is treatment dosage, and why does it matter?
Treatment dosage refers to the total amount of light energy delivered during a session. It depends on several factors, including irradiance, treatment time, distance from the device, and the area being treated. Research suggests red light therapy follows a biphasic dose-response, meaning too little light may have little effect, while too much may reduce potential benefits. That’s why following evidence-based treatment guidelines is more important than simply using a device for longer.
Why does treatment distance matter?
The farther you are from a red light therapy device, the less light reaches your body. As distance increases, irradiance decreases, meaning your tissues receive less energy over the same amount of time. That’s why manufacturers typically recommend a treatment distance and session length for each device. Following those recommendations helps you receive a more consistent and effective dose.
Why isn't more light always better?
More light doesn’t necessarily produce better results. Researchers have identified a phenomenon called the biphasic dose response, which suggests that both too little and too much light may be less effective than an optimal dose. This is one reason why treatment protocols specify factors like wavelength, irradiance, distance, and session time rather than simply recommending the longest treatment possible.
How deeply does red light penetrate the body?
Penetration depends on the wavelength of light and the type of tissue being treated. Visible red light generally reaches the skin and tissues just beneath the surface, while near-infrared light penetrates deeper into muscles and joints. However, penetration depth varies between individuals and should be viewed as an estimate rather than a fixed distance.
Does skin tone affect red light therapy?
Current evidence suggests red light therapy can be used safely across all skin tones. Melanin absorbs some visible light, which may slightly affect how red wavelengths interact with the skin, while near-infrared light is less influenced by skin pigmentation. Researchers continue to study these differences, but there is no evidence that people with darker skin tones cannot benefit from red light therapy.
Does body fat affect light penetration?
Yes, body composition can influence how deeply light travels through tissue. As light passes through the body, some of it is absorbed and scattered by skin, fat, muscle, and other tissues. This is one reason treatment protocols may vary depending on the target tissue. While near-infrared light generally penetrates deeper than visible red light, neither travels through the body without limitation.
Red Light vs Near-Infrared Light
What is the difference between red light and near-infrared light?
Red light and near-infrared (NIR) light are both used in photobiomodulation, but they occupy different parts of the light spectrum. Red light is visible to the human eye and is commonly used for skin-related applications, while near-infrared light is invisible and penetrates deeper into the body’s tissues. Many modern devices combine both wavelengths to target both superficial and deeper tissues during the same treatment.
Which penetrates deeper into the body?
Near-infrared light generally penetrates deeper into biological tissues than visible red light. While red wavelengths primarily affect the skin and tissues just beneath the surface, near-infrared wavelengths can reach deeper muscles, joints, and connective tissues. However, penetration varies depending on factors such as wavelength, tissue type, and individual body composition.
Which is better for skin concerns?
For many cosmetic skin concerns, including fine lines, wrinkles, and collagen support, visible red light has been studied more extensively than near-infrared light. That said, many clinical studies use both red and near-infrared wavelengths together, making it difficult to attribute results to a single wavelength alone.
Which is better for muscles and joints?
Near-infrared light is generally preferred for muscles and joints because it penetrates deeper into the body than visible red light. Researchers have studied near-infrared wavelengths for muscle recovery, joint discomfort, and other musculoskeletal applications, although many devices combine both red and near-infrared light to provide broader coverage.
Why do many devices combine red and near-infrared light?
Many manufacturers include both red and near-infrared LEDs because each wavelength reaches different tissue depths. Red light primarily targets superficial tissues like the skin, while near-infrared light reaches deeper structures. Combining both wavelengths allows a single device to support a wider range of potential applications without requiring separate treatments.
Can you feel near-infrared light?
No. Unlike red light, near-infrared light is invisible to the human eye, so you won’t see it during treatment. Some people may notice mild warmth depending on the device, but photobiomodulation itself is considered a non-thermal therapy, meaning its biological effects are not caused by heat.
Does near-infrared light produce heat?
Near-infrared light can produce a mild warming sensation, particularly with higher-powered devices, but that warmth is not what drives photobiomodulation. The therapeutic effects are believed to result from how specific wavelengths interact with cells rather than from heating the tissue. If a device becomes excessively hot, it’s functioning differently than a typical photobiomodulation device.
Can I use red light and near-infrared light at the same time?
Yes. In fact, many red light therapy devices are designed to deliver both red and near-infrared light simultaneously. Because the two wavelengths target different tissue depths, using them together is common and supported by many treatment protocols. Unless your device or healthcare provider recommends otherwise, there is generally no need to use them separately.
Red Light Therapy Benefits
How long does red light therapy take to work, and how long do the results last?
No. Results can vary based on factors such as age, overall health, skin type, the condition being treated, treatment consistency, and the quality of the device. Differences in wavelength, irradiance, treatment duration, and dosage can also influence outcomes. Like many therapies, some people experience greater benefits than others.
How long does red light therapy take to work, and how long do the results last?
Results vary depending on the condition being treated, the quality of the device, and how consistently it’s used. Some people notice subtle improvements within a few weeks, while others may need several months of regular treatment. Most clinical studies evaluate results after multiple weeks of consistent use. If treatment is discontinued, benefits such as improved skin appearance or hair growth may gradually diminish, making maintenance sessions important for many applications.
How much improvement should I realistically expect?
Red light therapy may produce meaningful improvements for some conditions, but it’s unlikely to deliver dramatic, overnight results. In clinical studies, improvements are often gradual and modest, particularly for skin aging, hair growth, and muscle recovery. Individual results depend on factors such as your health, treatment protocol, and the condition being addressed.
Are before-and-after photos realistic?
Some are, but many should be viewed with caution. Lighting, camera angles, facial expressions, and editing can make results appear more dramatic than they really are. The most reliable evidence comes from randomized controlled trials rather than marketing photos. Look for brands that support their claims with published research instead of relying solely on testimonials.
What benefits have the strongest scientific evidence?
The strongest evidence supports the use of red light therapy for certain skin concerns, including wrinkles and collagen production, pattern hair loss (androgenetic alopecia), oral mucositis in cancer patients, and some types of musculoskeletal pain. While research in these areas is encouraging, the quality of evidence still varies, and treatment protocols are not always standardized.
What benefits are still being researched?
Researchers continue to study red light therapy for many potential applications, including cognitive health, mood, sleep, athletic performance, weight management, nerve regeneration, and various chronic conditions. While some early findings are promising, these areas generally require larger, high-quality clinical trials before firm conclusions can be made.
Skin and Beauty Questions
Can red light therapy reduce wrinkles and improve skin texture?
Research suggests red light therapy may help reduce the appearance of fine lines and wrinkles while improving overall skin texture. Clinical studies have reported improvements in skin complexion, roughness, and elasticity after several weeks of consistent treatment. Results are typically gradual and vary from person to person, making red light therapy a supportive skincare treatment rather than a replacement for procedures like lasers or injectables.
Does red light therapy increase collagen production?
Research suggests it may. Red light therapy has been shown in laboratory and clinical studies to stimulate fibroblasts, the cells responsible for producing collagen and elastin, which may contribute to firmer, healthier-looking skin over time. While the results are encouraging, collagen production naturally declines with age, so ongoing treatments may be needed to maintain improvements.
Can red light therapy help acne?
Yes, red light therapy has been studied as a supportive treatment for acne, particularly inflammatory acne. Researchers believe it may help reduce inflammation and support the skin’s natural healing process. However, blue light has been studied more extensively for targeting acne-causing bacteria, and many acne devices combine both red and blue light for this reason.
Can it improve rosacea?
Possibly. Some small studies suggest red light therapy may help reduce redness and inflammation associated with rosacea, but the evidence is still limited. Because rosacea varies widely from person to person, it’s best to consult a dermatologist before adding red light therapy to your treatment plan.
Can it help eczema or psoriasis?
Researchers are investigating red light therapy for inflammatory skin conditions such as eczema and psoriasis, but the evidence remains limited. Some people report symptom relief, and small studies have shown promising results, but red light therapy should not replace treatments recommended by your dermatologist.
Can red light therapy reduce scars?
Red light therapy may help improve the appearance of some scars by supporting collagen production and the skin’s natural healing process. While research is encouraging, results depend on factors such as the type, age, and severity of the scar. It should be viewed as a complementary treatment rather than a guaranteed solution.
Can it improve stretch marks?
There is limited research specifically examining red light therapy for stretch marks. Because stretch marks involve changes in collagen and elastin, researchers believe photobiomodulation may offer some benefit, but more high-quality human studies are needed before firm conclusions can be drawn.
Can it help hyperpigmentation or dark spots?
The evidence for hyperpigmentation is mixed. While red light therapy may improve overall skin tone and support healing, it is not considered a primary treatment for melasma or other forms of hyperpigmentation. Treatments such as topical medications, chemical peels, or certain lasers typically have stronger supporting evidence.
Can I use skincare products with red light therapy?
Yes, but many experts recommend using red light therapy on clean, dry skin before applying skincare products. Makeup, sunscreen, and thick creams may reduce the amount of light reaching your skin. After your session, you can apply moisturizers, serums, or other products as directed. If you use prescription skincare or products that increase skin sensitivity, ask your dermatologist about the best routine.
Can I combine red light therapy with cosmetic treatments like microneedling or Botox?
Often, yes, but timing matters. Red light therapy is commonly used alongside cosmetic procedures such as microneedling, laser treatments, and injectable treatments, though recommendations vary depending on the procedure and your provider’s protocol. Before combining treatments, follow the guidance of your dermatologist, plastic surgeon, or aesthetic provider.
Muscle, Joint, and Recovery Questions
Can red light therapy reduce muscle soreness?
Research suggests red light therapy may help reduce delayed-onset muscle soreness (DOMS) and support recovery after exercise. Some studies have found improvements in muscle fatigue, soreness, and recovery markers, though results vary depending on the treatment protocol and the individual. It should be viewed as a recovery aid rather than a replacement for proper training, nutrition, and rest.
Can it help with joint pain?
Possibly. Red light therapy has been studied for several types of joint pain, with some clinical trials reporting reduced pain and improved function. While results vary depending on the condition, many researchers consider photobiomodulation a promising complementary therapy for certain musculoskeletal disorders.
Can it help arthritis?
Some research suggests red light therapy may help reduce pain and stiffness associated with certain forms of arthritis, particularly osteoarthritis. However, it does not treat the underlying disease or stop arthritis from progressing. It is best used as part of a broader treatment plan developed with your healthcare provider.
Can red light therapy reduce inflammation?
Research suggests photobiomodulation may help regulate inflammatory processes rather than simply “turning inflammation off.” Laboratory and clinical studies have observed changes in inflammatory markers following treatment, but responses vary depending on the condition being treated. More research is still needed to determine the most effective treatment protocols for different inflammatory conditions.
Can it help tendon or ligament injuries?
Red light therapy has been studied for tendon and ligament injuries because of its potential to support tissue repair and reduce pain. While some studies have shown promising results, the evidence is mixed, and treatment protocols are not yet standardized. It should be considered a complementary therapy alongside rehabilitation, not a substitute for it.
Should I use red light therapy before or after exercise?
Research has examined both approaches. Using red light therapy before exercise may help support muscle performance and reduce fatigue, while using it after exercise is commonly studied for recovery and reducing soreness. There is no single “best” timing, and the ideal approach may depend on your training goals and the treatment protocol being used.
Can athletes benefit from red light therapy?
Possibly. Red light therapy has been studied in both recreational and elite athletes for muscle performance, recovery, and fatigue. While some studies report improvements in recovery time and exercise performance, results are not universal, and red light therapy should be viewed as one tool within a well-rounded training and recovery program.
Mood, Sleep, and Wellness Questions
Can red light therapy improve sleep?
Some research suggests red light therapy may support better sleep quality, but the evidence is still limited. Unlike blue light, red light has little effect on melatonin suppression, making it a popular choice in evening routines. While some small studies have reported improvements in sleep, larger, high-quality clinical trials are needed before firm conclusions can be made.
Should I use red light therapy in the morning or evening?
It depends on your goals. Many people prefer evening sessions because red light doesn’t suppress melatonin the way blue light does, while others use it in the morning as part of their wellness routine. Current research hasn’t established one “best” time of day, so consistency is generally more important than timing.
Can red light therapy reduce stress?
Some people find red light therapy relaxing, but it’s difficult to separate the effects of the light itself from simply taking 10 to 20 minutes to rest. While early research is exploring potential effects on stress and mood, there is currently limited clinical evidence showing that red light therapy directly reduces stress.
Can it help seasonal affective disorder (SAD)?
There is currently limited evidence supporting red light therapy for seasonal affective disorder. The standard treatment for SAD is bright light therapy, which uses high-intensity white light rather than red light. If you think you have seasonal depression, it’s important to speak with a healthcare provider about evidence-based treatment options.
Is red light therapy the same as a SAD light?
No. Although both involve exposure to light, they serve different purposes. Red light therapy uses specific red and near-infrared wavelengths that are being studied for cellular effects, while SAD lamps use bright white light to help regulate circadian rhythms and treat seasonal affective disorder. They are not interchangeable.
Can red light therapy improve energy levels?
Some people report feeling more energized after regular red light therapy, and researchers have proposed that improved cellular energy production may play a role. However, clinical evidence supporting red light therapy as an energy booster is still limited. If you’re experiencing persistent fatigue, it’s important to work with a healthcare provider to identify any underlying medical causes.
Can red light therapy improve sleep?
Some people use evening red light as part of a wind-down routine, and there’s early interest in light’s role in sleep. The evidence is limited, and solid sleep habits remain the foundation of better rest. See what the sleep research suggests.
Weight Loss and Body Contouring Questions
Can red light therapy help with weight loss or body contouring?
Red light therapy has been studied for body contouring and localized fat reduction, but the evidence is mixed. Some studies have reported modest reductions in body circumference when combined with diet and exercise, while others have found little or no effect. At this time, red light therapy should not be viewed as a proven weight-loss treatment or a substitute for healthy lifestyle habits.
Does red light therapy reduce body fat?
Current research does not support red light therapy as a reliable method for reducing overall body fat. While some studies have explored whether it may temporarily affect fat cells or body measurements, results have been inconsistent and often involve small sample sizes. Sustainable fat loss still depends on factors such as nutrition, physical activity, sleep, and overall energy balance.
Can it reduce cellulite?
There is some evidence that red light therapy may temporarily improve the appearance of cellulite, particularly when combined with exercise or massage. However, the improvements reported in studies are generally modest, and more high-quality research is needed. No current treatment permanently eliminates cellulite.
Is red light therapy the same as CoolSculpting?
No. Red light therapy and CoolSculpting work through completely different mechanisms. CoolSculpting uses controlled cooling (cryolipolysis) to destroy fat cells, while red light therapy uses red and near-infrared light to influence cellular activity. CoolSculpting has substantially stronger clinical evidence for reducing localized fat deposits, whereas research on red light therapy for body contouring remains limited.
How long do body contouring results last?
If red light therapy produces visible body contouring changes, maintaining those results generally depends on maintaining a stable weight and healthy lifestyle. Research has not demonstrated permanent fat reduction from red light therapy alone, and any improvements may diminish over time without ongoing healthy habits.
Safety and Side Effects
What are the side effects and risks of red light therapy?
Red light therapy is generally considered safe when used as directed, and serious side effects are uncommon. Some people may experience temporary redness, mild skin irritation, eye discomfort from improper eye protection, or warmth during treatment. Following the manufacturer’s instructions and avoiding excessive treatment times can help reduce the risk of side effects.
Who should avoid red light therapy?
While red light therapy is safe for many people, it may not be appropriate for everyone. People with certain eye conditions, those taking medications that increase light sensitivity, or individuals with active cancer or other serious medical conditions should consult their healthcare provider before beginning treatment. If you’re unsure whether red light therapy is appropriate for you, seek medical guidance first.
Can I use red light therapy during pregnancy?
There isn’t enough high-quality research to determine whether red light therapy is safe during pregnancy. Because of the limited evidence, many healthcare providers recommend avoiding unnecessary treatments during pregnancy unless specifically advised otherwise by your obstetrician or healthcare provider.
Can children or teenagers use red light therapy?
Red light therapy has been studied for some pediatric conditions, but research in children and teenagers remains limited compared with adults. If you’re considering red light therapy for a child or teen, consult their pediatrician or dermatologist first to determine whether it’s appropriate for their specific condition.
Can I use red light therapy if I have tattoos?
Generally, yes. Tattoos don’t automatically prevent you from using red light therapy, but tattooed skin may absorb light differently depending on the pigment. If your tattoo is new or still healing, wait until it has fully healed before treating the area. If you notice discomfort or unusual skin reactions, discontinue use and consult a healthcare provider.
Is red light therapy safe if I have a history of skin cancer?
If you have a history of skin cancer or are being treated for cancer, speak with your dermatologist, oncologist, or healthcare provider before using red light therapy. While red light therapy does not use ultraviolet (UV) radiation, your provider can help determine whether it’s appropriate based on your medical history.
Can I use red light therapy while taking photosensitizing medications?
Possibly, but you should check with your healthcare provider first. Certain medications—including some antibiotics, acne medications, diuretics, and herbal supplements like St. John’s wort—can increase sensitivity to light. Your provider or pharmacist can advise whether your medication may affect your use of red light therapy.
Do I need eye protection?
It depends on the device and the area being treated, but eye protection is often recommended, especially with high-powered panels or when treating near the face. Even though red light therapy doesn’t use UV radiation, bright light can still cause discomfort or potentially affect the eyes if used improperly. Follow the manufacturer’s recommendations and wear protective goggles when advised.
What should I do if I experience side effects?
Most side effects are mild and temporary. If you experience persistent redness, irritation, eye discomfort, or any unexpected reaction, stop using the device and follow the manufacturer’s instructions. If symptoms persist or worsen, consult your healthcare provider. You should also discontinue use until you’ve identified the cause of the reaction.