Green Light Therapy Benefits: Potential Effects on Pain, Skin, and Overall Wellness

Green light therapy uses wavelengths within the green portion of the visible spectrum (approximately 500–570 nm), although many migraine and pain studies have focused on narrower bands around 525–535 nm. Research suggests it may help reduce migraine frequency and support chronic pain management, making these the most studied applications. Early findings also suggest potential benefits for skin health, photoaging, and overall well-being, though these areas currently have less evidence.

Green light therapy treatment is administered two different ways. For migraine and pain, the studied approach involves viewing low-intensity green light in a dimmed room for an extended period each day, working through the eyes and nervous system. For skin, it means applying green LED light to the skin, an area where evidence is still early and mostly limited to the lab.

Key research findings on green light therapy:

• Green light therapy may help reduce migraine frequency and severity. A clinical trial found that patients with episodic and chronic migraines experienced fewer headache days and improvements in quality of life after viewing green light for one to two hours daily over 10 weeks.

• Green light may help reduce chronic pain. In a study of fibromyalgia patients, participants who viewed green light daily reported significant reductions in pain intensity along with improvements in multiple quality-of-life measures.

• Green light may influence the body’s natural pain-relief systems. Preclinical research found that green light exposure increased endogenous opioid activity and reduced neuroinflammation, two mechanisms associated with pain reduction.

• Green light may help support anti-inflammatory processes. Multiple studies suggest green light can influence inflammatory signaling pathways that contribute to pain sensitivity and tissue stress.

• Green light may have potential skin health benefits. Early laboratory research found that green light increased collagen production, reduced collagen-degrading enzymes, and improved markers associated with photoaging.

• Green light therapy is generally well tolerated. Human studies involving migraine and fibromyalgia patients reported no significant side effects during treatment.

As interest in non-invasive wellness therapies continues to grow, green light therapy is gaining attention as a potential tool for pain management and overall well-being. Below, we’ll explore what current research says about the benefits of green light therapy, how it works in the body, how it compares to other wavelengths of light, and what results you can expect.

What to Know About Green Light Therapy

Green light therapy is a non-invasive form of LED light therapy that uses wavelengths within the green portion of the visible light spectrum. While research is still evolving, current evidence suggests green light may be particularly beneficial for migraine management, chronic pain support, and overall well-being, with emerging interest in its potential skincare applications.

The potential benefits of green light therapy are not all supported by the same level of evidence. Migraine management and chronic pain relief currently have the strongest clinical research behind them, while areas such as skin health, photoaging, and pigmentation are still being investigated. Understanding where the evidence is strongest can help set realistic expectations and determine whether green light therapy aligns with your goals.

Potential Benefits of Green Light Therapy

Research on green light therapy is still evolving, but several benefits have emerged across both human and preclinical studies. 

May Help Reduce Migraine Frequency and Severity

Migraines are one of the most researched applications of green light therapy. In a clinical trial involving patients with episodic and chronic migraine, participants who viewed green LED light in a dimmed room for one to two hours a day over 10 weeks experienced significant reductions in monthly headache days, along with improvements in headache intensity, headache duration, sleep quality, work performance, and overall quality of life.

Researchers believe these benefits may stem from green light’s ability to influence how the brain and nervous system respond to pain while also helping calm inflammation associated with migraine attacks. By affecting both pain perception and inflammation, green light may help reduce the overall burden of migraine symptoms over time.

May Support Chronic Pain Relief

In addition to migraines, green light therapy has shown promise for chronic pain conditions such as fibromyalgia and osteoarthritis. In a clinical trial involving fibromyalgia patients, participants who continued their existing medications and treatment plans reported significant reductions in pain intensity and symptom burden after regular green light exposure. Similar pain-relieving effects have also been observed in preclinical studies of osteoarthritis and post-surgical pain, suggesting green light therapy may serve as a supportive addition to broader pain-management strategies.

Research suggests green light may support pain relief in several ways, including to help calm inflammation and stimulate some of the body’s natural pain-relief systems. While red and near-infrared light are commonly studied for recovery and pain-related applications, green light research has focused more specifically on migraine, pain perception, and nervous system signaling.

May Support Healthier-Looking Skin and Signs of Photoaging

Researchers are also investigating green light therapy for skin health. In a laboratory study examining photoaging, low-energy green light increased type I and type III collagen production while reducing MMP-1, an enzyme involved in collagen breakdown. Researchers also observed improvements in markers associated with cellular aging and skin stress.

These findings suggest green light may help support collagen production, healthy skin function, and a more balanced skin environment by helping reduce cellular stress and inflammation. However, this evidence comes from skin cells in the lab, not people, and green light penetrates the skin less deeply than red or near-infrared light — the wavelengths more established for collagen support. While the early signals are promising, additional human studies are needed to better understand its effects on skin.

May Improve Quality of Life and Overall Well-Being

One of the most consistent findings across green light therapy studies is improvement in quality-of-life measures. In both migraine and fibromyalgia trials, participants reported benefits that extended beyond pain reduction, including better sleep, improved daily function, and a reduced impact of symptoms on work and routine activities.

These improvements are likely linked to green light’s effects on pain signaling and nervous system regulation. As pain becomes less disruptive, individuals may experience meaningful improvements in comfort, productivity, and overall well-being.

How Green Light Therapy Works

Researchers are still working to fully understand how green light works in the body, but several biological mechanisms have emerged from both clinical and preclinical studies. Current evidence suggests green light may affect pain signaling, inflammation, natural pain-relief pathways, and cellular repair processes, which together may help explain many of its observed benefits.

Unlike many therapies that focus on a single target, green light therapy appears to influence several biological processes at the same time. For example, helping calm inflammation may reduce pain sensitivity, while supporting the body’s natural pain-relief systems may further improve comfort. Researchers have also observed effects on cellular processes involved in skin health and tissue maintenance.

Because these mechanisms overlap and influence one another, researchers believe they may collectively contribute to many of the benefits associated with green light therapy, including pain relief, improved well-being, and healthier-looking skin.

Green Light Therapy vs. Red, Blue, Yellow, and NIR Light

Green light therapy uses wavelengths within the green portion of the visible light spectrum, typically ranging from approximately 500 to 570 nanometers (nm). Like other forms of LED light therapy, it works by exposing the body to specific wavelengths of light that can influence biological processes linked to health and wellness. What makes green light unique is that much of the current research focuses on pain-related applications, particularly migraine management and chronic pain support.

However, green light is just one of several wavelengths used in light therapy. Different colors of light interact with the body differently, which is why certain wavelengths are more commonly associated with goals such as collagen support, acne management, skin rejuvenation, or muscle recovery. Understanding these differences can help you choose the wavelength that best aligns with your needs.

While there is some overlap between wavelengths, each tends to be studied for different applications. Green light stands out because much of its research focuses on pain perception and nervous system function, whereas red light and near-infrared light are more commonly studied for skin health, cellular energy support, and physical recovery. Yellow and blue light therapy are most often associated with specific skincare treatments and oral care applications.

Rather than asking which wavelength is “best,” it’s more helpful to ask which wavelength is best suited to your goals. The answer may be very different for someone looking to manage migraines than for someone focused on collagen support, acne, muscle recovery, or overall skin health.

One important difference: blue, yellow, red, and near-infrared light are applied to the skin, while green light's best-supported use (migraine and pain relief) involves viewing the light. A green LED used as a skincare device is not the same as the green-light exposure studied for migraines.

How to Use Green Light Therapy

Most green light therapy studies showing benefits for migraine and chronic pain used consistent exposure over several weeks rather than occasional treatments. While the ideal protocol depends on the device and treatment goal, the following guidelines can help set realistic expectations.

Tips for using green light therapy:

• Follow your device’s recommended treatment schedule. Clinical studies on migraine and fibromyalgia involved viewing green light in a dimmed room for 1 to 2 hours per day. Consumer devices may require shorter or longer sessions depending on their design and light output.

• Use it consistently for several weeks. Green light therapy isn’t intended to deliver immediate results. Most studies evaluated outcomes after weeks of regular use, suggesting the biological effects build gradually over time.

• Match your expectations to your goal. Someone using green light therapy for migraine support may notice different results on a different timeline than someone using it as part of a skincare or wellness routine.

• Track changes over time. For migraine, pain, sleep, or wellness goals, consider keeping a symptom journal to identify trends that may be difficult to notice day-to-day.

• Think of green light therapy as a supportive tool. Current research suggests it may work best as part of a broader wellness or treatment plan rather than as a standalone solution for chronic health concerns.

Because research on green light therapy is still developing, there is no universally accepted protocol for every application. Following device-specific guidance and maintaining a consistent routine are generally considered the most important factors for success.

Are There Any Side Effects of Green Light Therapy?

One reason green light therapy has attracted attention in both research and wellness settings is its favorable safety profile. In clinical studies involving migraine and fibromyalgia patients, participants reported significant improvements in symptoms without any serious treatment-related side effects.

That said, “safe” does not necessarily mean “appropriate for everyone.” Individual responses can vary, and certain people may need to take additional precautions when using any form of light therapy.

Potential considerations before using green light therapy:

• Photosensitivity: People with light-sensitive medical conditions or those taking medications that increase sensitivity to light should consult a healthcare professional or dermatologist before use.

• Eye comfort: While green light is generally considered less visually uncomfortable than some other wavelengths, staring directly into bright LEDs may still cause temporary eye strain or discomfort. Because the migraine and pain protocols involve viewing light through the eyes, anyone with a retinal condition or other eye disorder should check with an eye doctor before starting.

• Migraine triggers vary: Although green light has shown support for migraine relief, individual triggers differ. Some people may tolerate green light well, while others may need to start gradually and monitor their response.

• Underlying medical conditions: Anyone managing a chronic medical condition should speak with a healthcare provider before starting a new therapy, especially if it will be used alongside existing treatments.

Green light therapy is generally well tolerated, particularly when used according to device instructions. However, more long-term research is needed to fully understand its effects across different populations, skin types, and treatment applications.

Finding the Right Light Therapy for Your Goals

Green light therapy is still an emerging area of research, but the evidence so far is encouraging. Studies have reported benefits for migraine management, chronic pain relief, quality of life, and overall well-being, while early research suggests potential applications for skin health and photoaging. Although more research is needed, green light therapy offers a non-invasive, well-tolerated option for people looking to support their health without relying solely on medications.

While green light has attracted attention for pain-related applications, other wavelengths may be better suited for goals such as skin rejuvenation, muscle recovery, joint support, and cellular health. If you’re interested in exploring evidence-backed light therapy options, Novaalab’s collection of red light therapy devices is designed to help support recovery and wellness from the comfort of home.