Red light therapy is not a recommended first-line treatment for a fresh sunburn. Red and near-infrared light are different from ultraviolet (UV) light, but current evidence does not show that an at-home red-light mask or panel safely speeds healing or reliably reduces pain from an ordinary sunburn. These devices can also irritate the skin, and the American Academy of Dermatology warns that some devices may worsen light-sensitive conditions.
A 2025 study of 10 healthy participants used controlled UVB exposure and medical LED treatment. The study does not show that a consumer red-light device can treat a real-world sunburn.
Sunburn and Red Light Therapy: At a Glance
| Question | Practical answer |
|---|---|
| Can red light therapy cure sunburn? | No established evidence supports it as a sunburn treatment. |
| Does red light contain UV? | Standard red-light therapy uses red or near-infrared light, not ultraviolet light. |
| Should you use a home device on blistered or peeling skin? | No. Ask a healthcare professional first. |
| What works better? | Cool water, aloe or soy moisturizer, hydration, pain relief, and avoiding further sun exposure. |
| When should you seek medical care? | Seek care for severe pain, extensive blistering, fever, chills, nausea, dehydration, pus, or worsening swelling. |
Is Red Light Therapy the Same as Sunburn Treatment?
No. Sunburn is an acute skin injury caused by ultraviolet radiation. Red-light therapy, also called photobiomodulation, uses red or near-infrared light. The fact that it does not use UV light does not make it a proven treatment for a fresh sunburn.
Research on photobiomodulation has looked at wound healing, burn wounds, scars, and acute radiation dermatitis. Those conditions and treatment protocols are different from an ordinary UV-induced sunburn.
A 2025 expert consensus supported photobiomodulation for several specific medical uses, including some wounds and cases of acute radiation dermatitis. It did not establish red light as a standard treatment for ordinary sunburn.
The 2025 study mentioned above involved 10 healthy participants, controlled UVB exposure, and specific clinical wavelengths and doses. It does not establish that a consumer red-light mask will treat a sunburn.
What Should You Do Instead for a Sunburn?
For a sunburn, use basic skin-care measures that cool the skin, support hydration, and prevent further exposure. The American Academy of Dermatology recommends:
- Get out of the sun and protect the burned skin while it heals.
- Take a cool bath or shower or apply a cool, damp cloth.
- Apply a moisturizer containing aloe vera or soy while the skin is still damp.
- Drink extra water because sunburn can contribute to dehydration.
- Use an appropriate pain reliever, such as ibuprofen or acetaminophen, if you can safely take it.
- Do not pop blisters. Blistering can indicate a deeper, second-degree sunburn.
Do not use a red-light device on skin that is blistered, peeling, open, unusually painful, or becoming warmer and more irritated unless a healthcare professional recommends it.
Can Red Light Help After a Sunburn Heals?
Possibly, but this is a different question from treating the acute burn. Red-light therapy has evidence for some skin and wound-healing applications. Results depend on the wavelength, dose, device, treatment schedule, and skin condition. At-home devices vary considerably and can irritate the skin or worsen some light-sensitive conditions.
If redness, dark marks, or scarring remain after the skin has fully healed, ask a dermatologist whether red light is appropriate. Daily broad-spectrum sunscreen with SPF 30 or higher is more important for preventing additional damage and post-inflammatory pigmentation.
When Should You Get Medical Help?
Get medical help if the sunburn causes:
- Large or extensive blisters
- Severe pain or swelling
- Fever, chills, nausea, or vomiting
- Dizziness or signs of dehydration
- Pus, worsening swelling, or other signs of infection
- Eye pain or vision symptoms
Skip red light therapy for a fresh sunburn. Use cool compresses, a soothing moisturizer, hydration, pain relief, and strict sun avoidance instead. Consider red light only after the skin has recovered and after speaking with a dermatologist, especially if you have darker skin, a photosensitive condition, or take medication that increases light sensitivity.