Can Red Light Therapy Help an Ankle Sprain? What the Research Shows

Short answer: Red light therapy might be a reasonable add-on for an ankle sprain once you're past the first day or two, but the research is mixed, and it should never replace rest, support, a proper exercise plan, or an exam if you can't put weight on the ankle.

If you've ever rolled an ankle on a curb or a pickup basketball game, you know the routine: swelling, bruising, and a few days of limping while you wonder if you should be doing something more. This guide walks through what red light therapy can and can't do for a sprain, in plain terms.

What is red light therapy for an ankle sprain?

It means shining low-level red (about 660nm) and near-infrared (about 850nm) light on the sore area for a few minutes at a time. Researchers call this photobiomodulation. The idea is that light absorbed by tissue may influence cell energy and the body's normal repair and inflammation processes. It's a wellness tool studied as an adjunct, not a cure and not a substitute for care.

Does red light therapy actually help ankle sprains?

The honest answer is that results are mixed. One small trial of second-degree ankle sprains reported less swelling in people who received low-level laser treatment alongside standard care, according to its PubMed record. Another paper on fractionated irradiation in photobiomodulation therapy of ankle sprain explored how the way the light dose is delivered may matter.

On the other side, a larger double-blind trial of 217 adults with acute lateral ankle sprains, published in 1998, found no significant pain benefit from laser compared with placebo, and its authors concluded the treatment wasn't effective for those sprains.

So it's fair to say: some studies are encouraging, some aren't, and doses, devices, and timing differ a lot between them. If someone promises a faster recovery, be skeptical.

When is it safe to start after a sprain?

Ask your clinician first, especially in the first few days. Light therapy isn't a heat-heavy treatment, but a fresh sprain with a lot of swelling or bruising is exactly when you want a professional opinion. Red flags that mean you should be seen rather than experiment at home include:

• You can't bear weight or take four steps.
• The bone feels tender when pressed, or the ankle looks out of shape.
• Numbness, tingling, or a cold, pale foot.
• Pain or swelling that isn't improving after several days.

If a clinician has cleared you and you'd like to try light, many people start once the worst swelling has settled, using it alongside whatever rehab plan they've been given.

How would you use a panel or handheld device on an ankle?

Keep it simple. Follow your device's manual for distance and session length, expose bare skin, and aim the light at the sore area from the front, side, and back of the ankle in turn. Most people use short sessions a few times a week and keep the habit going for a few weeks before judging whether it's doing anything. Don't stare into the LEDs; eye protection is a good idea.

The FX300 sits on a table or desk so you can prop your foot up in front of it, which is handy when you're resting anyway. If you'd rather move the light around the joint by hand, the handheld device ($199.99, dual 660nm and 850nm) is easier to angle around the ankle bones. Browse everything in the red light therapy collection if you want to compare.

What should you still do for a sprain?

Light is the extra, not the plan. Guidance for sprains generally centers on protecting the joint early, easing back into movement, and rebuilding balance and strength so the ankle doesn't keep giving way. Many people skip that last part and end up re-spraining. A physical therapist can set you up with an exercise progression that fits your injury.

Can you pay for it with an FSA or HSA?

Many AWA devices are eligible for FSA and HSA payment, so you can use pre-tax dollars. Our guide to paying with your FSA or HSA explains how checkout works, and the FSA/HSA eligible collection lists what qualifies.

Frequently asked questions

Can red light therapy heal a sprained ankle faster?

There isn't solid proof that it does. Some small studies suggest less swelling, while a larger placebo-controlled trial found no benefit, so treat it as an optional comfort-focused add-on.

Can I use red light therapy on a swollen ankle?

Many people do, but get a new injury checked first. If swelling is severe or getting worse, see a clinician before trying anything at home.

How often should I use it on an ankle?

Follow your device's instructions. Short sessions several days a week are common, and more isn't automatically better.

Is red light therapy better than ice or a brace?

It's not a replacement for either. Support and activity guidance from your clinician come first; light is something you might add on top.

Will it help a chronic, "weak" ankle?

Evidence there is limited too. Strength and balance work are the most reliable way to improve a wobbly ankle, and light may be a comfortable complement.

Which AWA device suits ankles?

The FX300 panel is a good fit if you want hands-free sessions, and the handheld device suits people who want to aim the light by hand. The device finder quiz can narrow it down.

Take it one step at a time, and be patient with a healing joint. Lights on, pain off.

This article is for general education and is not medical advice. Red light therapy devices are intended for general wellness and are not intended to diagnose, treat, cure, or prevent any disease. Always check with a qualified healthcare provider before starting a new therapy.