Red light therapy side effects and dangers

What can actually go wrong, and how to avoid it.

Reviewed by the LumaWrap team · Last updated

LumaWrap red light therapy wrap

Common, mild side effects

  • Gentle warmth during the session
  • Temporary pinkness of the skin that fades within an hour
  • Glare if you look at the lights

The cancer question

It is one of the most searched questions. Red (660nm) and near-infrared (850nm) light contain no ultraviolet, which is the part of sunlight linked to skin cancer. That said, anyone with a current or past cancer should speak to their specialist before using a light device on that area.

Who should not use it without advice

  • Pregnancy (do not use over the abdomen)
  • Light-sensitising medication
  • Epilepsy triggered by light
  • Reduced skin sensation
  • Over tattoos, broken skin, or areas of suspected infection

The full list is in is red light therapy safe?

The real danger: cheap devices

No stated wavelength, no timer, no UK returns, and a price that seems too good. LumaWrap has a 20-minute automatic shut-off, stated wavelengths, a 2-year warranty and 90-day money back.

Common questions

What are the side effects of red light therapy?+

The most common are mild warmth or temporary redness of the skin. Bright light can be uncomfortable for the eyes, so do not look into the lights.

Can red light therapy cause cancer?+

Red and near-infrared light contain no UV, which is the part of sunlight linked to skin cancer. If you have or have had cancer, speak to your specialist before using any light device over that area.

Is red light therapy bad for your eyes?+

Do not stare into the lights. Point the panel at the skin, away from the face. For facial use, eye protection is advised.

Are there dangers with cheap devices?+

The main risks are poor electrical safety, overheating and no timer. Buy from a seller that states wavelengths, includes a timer and offers a UK returns policy.

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