Red light therapy is generally considered low risk for healthy adults when you use a well-made LED device as directed: it doesn't use ultraviolet light, so it doesn't tan or burn skin the way sunlight can. The main precautions are protecting your eyes from bright LEDs at close range, sticking to sensible session times so skin doesn't overheat, and checking with your GP first if you're pregnant, light-sensitive or on medication that increases sensitivity to light.
This guide covers eye safety, skin and heat, why lasers and LEDs aren't the same thing, who should wait, and a simple checklist for safe use at home.
Is red light therapy safe for your eyes?
Your eyes are the part of the body that needs the most care. Red and near-infrared LED panels are bright, and near-infrared light (around 810 to 850 nm) is largely invisible, so your natural reflex to blink or look away is weaker than it is for visible light. That's why reputable panels come with goggles.
- Wear the goggles supplied, especially for face sessions or when the panel is close to your head.
- Don't stare into the LEDs, even with goggles on. Close your eyes during facial sessions.
- Keep children and pets away from panels in use, as they're likely to look straight at them.
- Be extra careful with near-infrared: a panel that looks dim may still be emitting plenty of invisible light.
Laser vs LED: why device type matters
"Red light therapy" covers very different devices. Lasers concentrate light into a narrow, intense beam; home panels spread light from many LEDs across a wide area. That difference matters most for eyes.
In 2025, researchers at the University of Houston tested four red light devices sold to slow short-sightedness in children, which are designed to shine light directly into the eye. Their lab results, reported by Healio in June 2026 and published in JAMA Ophthalmology, suggested two of the laser-based devices could reach the safest exposure limit for eye light in just 1.4 and 2.8 seconds, against a recommended three-minute treatment. The one LED-based device took more than six hours to reach the same limit. One manufacturer disputed the findings, and the researchers stressed it was a hazard assessment rather than a study of real injuries, but their advice applies widely: don't assume every red light device carries the same risk.
Body and face panels aren't meant to be looked into at all, which is exactly why goggles and closed eyes are part of safe use.
LED light therapy on the body: skin and heat
Red light doesn't contain UV, so it isn't linked to sunburn or the skin damage caused by sunlight. The more common issue with body sessions is warmth: high-powered panels, especially at close range, can make skin hot or leave it a little pink for a while afterwards.
- Follow the recommended distance for your panel, often around 15 to 30 cm. Closer isn't automatically better and adds heat.
- Start with short sessions, such as 5 to 10 minutes, and build up only if your skin is comfortable.
- Stop if skin feels hot or stings. Move further away or shorten the session.
- Use on clean, dry skin. Some skincare products, such as retinoids and certain acids, can make skin more reactive; leave them off before a session.
- Don't fall asleep in front of a panel. Use the built-in timer or set one on your phone.
Who should check with a GP before using red light therapy?
Speak to your GP, pharmacist or dermatologist before starting if any of these apply:
- you're pregnant or breastfeeding;
- you have a light-sensitive condition, such as lupus or porphyria, or a history of light-triggered migraines or seizures;
- you take medication that increases sensitivity to light (some antibiotics, acne medicines, diuretics and others: the leaflet usually says);
- you have a history of skin cancer, or a mole or patch of skin that's changing;
- you have an eye condition, or have had recent eye surgery;
- you want to use it on a child.
Avoid shining light over a suspicious mole, a tattoo you're unsure about, or broken skin until you've had it checked.
Red light therapy home treatment: a safe-use checklist
Most problems with home devices come from how they're used rather than the light itself. Before each session:
- Check the panel is stable on its stand or mount, and the fan and vents aren't blocked.
- Put on the goggles, or close your eyes for facial use.
- Stand or sit at the distance the manufacturer recommends.
- Set a timer.
- Keep sessions short and consistent rather than long and occasional.
- Switch off and let the panel cool before moving it.
A secure setup helps here. A panel on a floor stand or wall mount stays at the same distance every time, so you're not guessing. Our guide to mounting red light panels at home covers distance and positioning in detail.
What to look for in a safe red light therapy device
- Published specifications: wavelengths and measured output at stated distances, not vague claims.
- UK safety markings: UKCA or CE marking for electrical safety, and a UK plug and supplier.
- Eye protection included in the box.
- A built-in timer and clear instructions on session length and distance.
- No medical promises. Home red light devices aren't licensed to treat conditions. Claims to cure skin disease, pain or anything else are a warning sign.
Our red light therapy panels list wavelengths, output and recommended distance on each product page; check the "what's in the box" details for eye protection before you buy.
Are there side effects of red light therapy?
Reported side effects with LED devices used as directed are usually mild and short-lived: temporary warmth or redness of the skin, tired or irritated eyes if goggles aren't worn, and occasionally headaches in people sensitive to bright light. If anything persists, stop using the device and get advice. For a balanced look at what the research does and doesn't show, read what the evidence says about red light therapy.
Frequently asked questions
Is red light therapy safe to use every day?
Many people use LED panels daily for short sessions. Keep to the manufacturer's guidance on time and distance, and take a break if your skin or eyes feel irritated.
Do I really need goggles for red light therapy?
Yes, for face sessions and whenever the panel is close to your head. For body sessions facing away from the panel, closing your eyes may be enough, but goggles are the simplest habit.
Can red light therapy burn your skin?
Red light doesn't cause sunburn, but a powerful panel used very close for a long time can make skin uncomfortably hot. Increase the distance or shorten the session.
Is red light therapy safe during pregnancy?
There's little research in pregnancy, so check with your GP or midwife before using it.
Is near-infrared light safe?
Near-infrared from LED panels is non-UV light, but it's invisible, so take eye protection seriously even when the panel looks dim.
Choose a device you can use safely
A well-specified panel, the right distance, goggles and a timer are what make red light therapy a low-risk routine. Compare our red light therapy panels, or ask our team about distance, session time and eye protection for the model you're considering.
This guide is general information, not medical advice. Red light therapy devices are not intended to diagnose, treat or prevent any condition.