Red Light Therapy for Sprained Ankle: Evidence, Timing and Home Use
Red light therapy for sprained ankle pain has modest, encouraging support: a 2024 review of six trials with 598 people found less pain on average with light therapy. The trials used light on the skin over the ankle, mostly in clinics and alongside ice, support and exercise. Below: the studies, why ice comes first, what guidelines say, braces, repeat sprains, warning signs and panel set-up.
Key takeaways
- A 2024 review of six trials with 598 people found less pain on average with light therapy for ankle sprains, while swelling and function were not clearly different. Alayat, 2024
- In a 2018 trial of 40 adults with a grade II sprain, 627 nm red LED light added to standard first aid for 6 days eased pain and swelling more than a switched-off LED. Prianti, 2018
- A 2021 US physiotherapy guideline says clinicians "may use low-level laser therapy to reduce pain in the initial phase" of an acute ankle sprain. JOSPT, 2021
- For the first 2 to 3 days, the NHS advises ice for up to 20 minutes every 2 to 3 hours and no heat. NHS
- Most people with a sprain feel better after about 2 weeks, according to the NHS. NHS
Does red light therapy for sprained ankle pain help?
It may ease pain in the early weeks as an add-on to first aid and exercise. The clearest signal across trials is lower pain, with smaller and less consistent results for swelling.
An ankle sprain is a stretch or tear of the ligaments, usually on the outer side when the foot rolls inwards.
| Study | Who | Light | What was found |
|---|---|---|---|
| Alayat, 2024 | 6 trials, 598 people with ankle sprains | Light therapy | Less pain on average; swelling and function not clearly different |
| Prianti, 2018 | 40 adults, grade II sprain | 627 nm red LED, 10 J/cm², with first aid | Less pain and swelling than a switched-off LED by days 3 and 6 |
| Stasinopoulos, 2017 | 50 adults, grade II sprain | Broad-spectrum clinic lamp, daily for 5 days, with ice | Less pain and swelling, better movement at day 5 |
| Bjordal, 2006 | Placebo-controlled trials in acute soft-tissue injury | Mostly 632 to 904 nm lasers | People 2.7 times as likely to report improvement |
The 2024 review rated its pain finding as moderate certainty. Its authors concluded that light therapy "is quite effective for patients with an ankle sprain". Alayat, 2024
The 2006 review covered acute soft-tissue injuries in general, pooling four trials with 379 people for the 2.7 figure. Bjordal, 2006
How soon after spraining your ankle can you use red light?
Ice comes first: use ice, rest, support and elevation for the first 48 hours and no light in the first 2 to 3 days. Start light from about day 3, over intact skin, once any warning signs have been checked.
The NHS advises avoiding heat, such as hot baths and heat packs, alcohol and massage for "the first couple of days". NHS A panel session feels warm on the skin, so it belongs after that window.
In the trials above, light started in the first days in a clinic, added to ice and first aid. At home, the order above keeps to standard first aid advice and matches our guide to red light therapy for athletes.
| Time after the sprain | What to do | Where light fits |
|---|---|---|
| Days 0 to 2 | Protect, rest, ice, compress, raise the ankle; no heat, alcohol or massage | No light |
| Day 3 to week 2 | Walk as pain allows, start gentle exercises, keep any support advised | From about day 3, 10 to 15 minutes, 3 to 5 times a week |
| Weeks 2 to 6 | Balance and strength work, brace or tape for sport | Optional add-on around the exercise sessions |
| After 4 to 6 weeks | Still painful or giving way: see a physiotherapist | Keep the focus on rehab |
Ice or red light for an ankle sprain: which comes first, and can you use both?
Ice comes first in the opening days, and light can be added later. In the positive trials, light was used on top of ice and first aid, never instead of it.
The NHS calls the first steps PRICE:
- Protection: a support or supportive footwear.
- Rest: stop the activity that caused the injury.
- Ice: "for up to 20 minutes every 2 to 3 hours". NHS
- Compression: a bandage during the day.
- Elevation: keep the ankle raised on a pillow as much as possible.
Mayo Clinic advises a thin towel between the ice and the skin, and says to check with a clinician before using ice if you have vascular disease, diabetes or reduced feeling in the skin. Mayo Clinic With diabetes, circulation problems or reduced feeling in the foot, check with a clinician before adding light too, then start at 12 inches and test warmth with a hand that has normal feeling.
Keep ice and light as separate sessions, and let the skin return to normal temperature and feeling before using light.
Does red light reduce ankle swelling and bruising?
Two small trials found swelling went down faster when light was added to ice and first aid. When the 2024 review pooled the trials, the effect on swelling was not clear-cut.
In the red LED trial, swelling was measured by limb volume and fell significantly more with light on days 3 and 6. Prianti, 2018 In the clinic lamp trial, swelling, pain and range of movement all improved more with light after five daily sessions. Stasinopoulos, 2017
For the bruise itself, see our guide to red light therapy for bruises. If you take blood thinners, ask your doctor before adding light.
What do physiotherapy guidelines say about light for ankle sprains?
Guidelines differ: a 2021 US physiotherapy guideline says clinicians may use low-level laser for pain in the early phase, with a Grade C rating. Both guidelines put exercise and external support at the centre of recovery.
Its strongest Grade A ratings go to exercise, braces or taping, and progressive weight bearing. JOSPT, 2021
A 2018 Dutch guideline does not advise laser for acute sprains and prefers a brace with exercise. Vuurberg, 2018 One large 1998 trial of a pulsed 904 nm laser added to a brace and exercises found no extra benefit. de Bie, 1998
The PEACE and LOVE framework puts protection first, then loading and exercise, ahead of passive treatments. Dubois, 2019 Treat light as a comfort add-on to the exercises.
What settings did the ankle sprain light studies use?
The positive trials gave light over 5 to 6 days in the first week, on the skin over the ankle, alongside ice or first aid. Doses were moderate, and a whole area was treated rather than a single point.
| Source | Light | Dose | Schedule | Alongside |
|---|---|---|---|---|
| Prianti, 2018 | 627 nm red LED | 10 J/cm² | Over 6 days | Protection, rest, ice, compression, elevation |
| Stasinopoulos, 2017 | Broad-spectrum clinic lamp | Not given in the summary | Daily for 5 days | Ice |
| Bjordal, 2006 | Mostly 632 to 904 nm lasers | 5 to 19.5 J in total over 3 or more points | Outcomes within 7 days | Various |
| WALT, 2010 | 780 to 860 nm laser | 8 J over 2 to 4 points | Daily for 2 weeks, or every other day for 3 to 4 weeks | Dose guidance only |
In the 2006 review, trials treating several points did better than single-point or very low doses. Bjordal, 2006 The WALT ankle figures appear in our guide to red light therapy for hands and feet.
Both red and near-infrared appear in the evidence, and the ankle ligaments sit close under the skin, so both reach them. Most research on red light therapy for ankle sprain used clinic lasers or lamps; one trial used a red LED. A home panel spreads lower-intensity light over a broad area, and laser joules do not convert into panel minutes. Our comparison of cold laser therapy vs red light therapy explains the difference.
Can you use red light over a brace, tape or bandage?
No: light needs bare skin, and a brace, tape or bandage blocks it. Never take off a cast, splint or brace to use light; use it only once your doctor or physiotherapist agrees the support can come off for a short session.
The Dutch guideline prefers a brace for 4 to 6 weeks over keeping the ankle immobile. Vuurberg, 2018
If your support is removable, ask your physiotherapist whether a short session with the ankle raised is fine, then put it back on. If the fall left a graze or cut, wait until it has fully closed. Our guide to whether red light works through clothes explains why fabric and dressings get in the way.
Does red light help an ankle that keeps rolling over?
Repeat sprains are prevented mainly by balance training, strength work and bracing, so that programme comes first. Light can sit alongside it as a comfort add-on during rehab.
About 40% of people who seek care for a first sprain go on to develop chronic ankle instability. JOSPT, 2021
Incomplete rehab is "the most common cause of chronic ankle instability". OrthoInfo Pain that lasts more than 4 to 6 weeks may mean a chronic sprain.
An overview of 46 reviews found strong evidence that bracing prevents recurrence and moderate evidence for neuromuscular training, such as balance work. Doherty, 2017 Mayo Clinic's balance examples include "standing on one leg".
When can you walk, exercise and return to sport after a sprain?
Most people can put some weight on the ankle within days, and exercise should start soon after the sprain. A full return to sport ranges from a day to several weeks, and longer for a severe tear.
The US guideline says a full return "from 1 day to a little more than 3 weeks" can be expected. JOSPT, 2021 More severe sprains can take "up to 6 to 12 weeks". OrthoInfo
Grade 1 is a stretched ligament, grade 2 a partial tear and grade 3 a full tear, where recovery "can take up to several months". Cleveland Clinic
The NHS advises avoiding strenuous exercise such as running for up to 8 weeks.
Which ankle injuries need a doctor or an X-ray before any light?
Go to A&E if you heard a crack, the ankle looks misshapen, or the foot is numb, tingling, blue, grey or cold. Get urgent advice if you cannot put weight on it or walk more than a few steps.
The NHS also advises calling 111 for very bad or worsening pain, large or worsening swelling or bruising, a very stiff ankle, a high temperature, or no improvement after self-care. NHS
Doctors use a checklist called the Ottawa ankle rules: an X-ray is advised for tenderness at the back edge or tip of either ankle bone, or if you could not take four steps after the injury and when examined. Physitrack
Across 27 studies, the rules picked up 97.6% of fractures. Fewer than 2% of people who passed the checklist had a fracture. Bachmann, 2003 The checklist is for a clinician to apply, so get checked rather than testing yourself.
How do you use a Kivorla panel on a sprained ankle?
From about day 3, sit with your bare foot raised and the outer side of the ankle about 6 inches from the panel, goggles on. Run red and near-infrared for 10 to 15 minutes per side, 3 to 5 times a week, alongside your exercises.
The 9-Spectrum Red Light Therapy Panel carries 480, 590, 630, 660, 670, 810, 830, 850 and 1060 nm, each dimmable from 1 to 100%. Its 630 nm channel sits near the 627 nm red of the LED trial, and its 810 to 850 nm channels sit inside the WALT laser range.
- Position: stand the panel upright on the floor, or hang it low on a door or wall with the included door hook, pulley, hanging cables and screws. Sit with the foot raised on a stool or cushion, ankle level with the middle of the panel.
- Aim: turn the outer side of the ankle towards the panel, where most sprained ligaments sit. Treat the inner side in a second session if it is also sore.
- Distance: about 6 inches, the panel's distance for a joint.
- Channels: 630, 660 and 670 nm red with 810, 830 and 850 nm near-infrared on; 1060 nm optional; 480 and 590 nm off. Use continuous light.
- Timer: 10 to 15 minutes per side. If no time is set, the panel stops at 5 minutes.
- Schedule: 3 to 5 times a week, with at least 6 hours between 30-minute sessions.
- Log: pain out of 10, swelling and how far you can walk; review after 2 to 3 weeks.
The skin should feel warm, never hot, and the panel surface stays at or below 40°C. For gentler first sessions, start with the red channels, a shorter timer (it starts at 1 minute) or near-infrared dimmed. To stay closer to the trial range, turn the channels down from 100% or step back to 12 inches.
Goggles and a controller are included; wear the goggles even at foot level and never look into the panel (see red light therapy goggles). Keep the brace, tape and exercises your physiotherapist advises.
If you take painkillers such as ibuprofen or any other medicine, note that our precautions rule out photosensitising medication, so check with your pharmacist or doctor before using the device.
Do not use the panel if you are pregnant, breastfeeding or preparing for pregnancy, have epilepsy or seizures triggered by light, have a thyroid condition or take thyroid medication, have broken skin on the ankle, have had sunburn on the body in the past 2 weeks, or have Fitzpatrick skin type V or VI. It is not for use while asleep.
Standard shipping to the US, UK and Germany is free. Read the precautions before ordering. Under our return and refund policy, returns are accepted within 30 days: an unopened device with its seals intact is refunded less a 10% restocking fee, and an opened device that is undamaged and complete is refunded less 20%.
Kivorla devices are general wellness devices, not medical devices, and are not intended to treat ankle sprains. See a doctor for a crack, a misshapen or numb foot, or an ankle you cannot walk on, and keep any brace, splint or exercises your doctor or physiotherapist has advised.