Red Light Therapy for Gout: Flares, Big Toe and Evidence
Red light therapy for gout has small but encouraging early evidence: in a 2006 study of 25 people with acute gout, daily laser light brought rapid pain relief, with no significant difference from the anti-inflammatory drug diclofenac. The rest of the support comes from animal studies of urate crystal arthritis and from trials in other joint pain, so light fits as an add-on to the medicine your doctor advises. Below: what the gout studies found, why ice comes first in a flare, uric acid and tophi, the settings researchers used, red flags, and how to set up a panel for a big toe, ankle or knee.
Key takeaways
- In a 2006 study, 25 people with acute gout had daily laser light or diclofenac 75 mg twice a day for 5 days, and both brought rapid pain relief with no significant difference between them. Soriano, 2006
- In rats with crystal arthritis of the knee, 670 nm red laser light lowered TNF-alpha, a key inflammatory signal, compared with untreated arthritis. Bartoli, 2021
- In a 2002 trial of 19 people in a gout flare, adding ice to medicine cut pain by 7.75 cm on a 10 cm scale, against 4.42 cm with medicine alone. Schlesinger, 2002
- The 2020 American College of Rheumatology guideline aims to keep blood urate under 6 mg/dL with urate-lowering medicine, with allopurinol as the preferred first choice. ACR, 2020
- Gout pain is usually worst within the first 8 to 12 hours of an attack, according to Mayo Clinic. Mayo Clinic
Does red light therapy for gout help?
It may ease pain as an add-on: in the one human study in acute gout, daily laser light relieved pain as quickly as diclofenac over 5 days. Animal studies of crystal arthritis add support, including calmer joint inflammation after 670 nm light.
| Study | Who | Light | What was found |
|---|---|---|---|
| Soriano, 2006 | 25 people with acute gout | Laser, daily for 5 days | Rapid pain relief, no significant difference from diclofenac |
| Bartoli, 2021 | Rats, crystal arthritis of the knee | 670 nm red laser, daily | Fewer inflammatory cells, lower TNF-alpha |
| Coracini, 2022 | 40 rats, urate crystals in the knee | Laser plus LED over the nerve roots | Less swelling, better grip, higher pain threshold |
| Chen, 2020 | 63 men after surgery for tophaceous gout, and 63 controls | Low-intensity laser in some patients | Pain score 0.56 against 1.04 |
In the 670 nm study, the authors wrote that red light "reduced the inflammatory process and tissue injuries of the synovial membrane". Bartoli, 2021
In the 2022 study, rats with urate crystals in the knee had less swelling and used the leg better after light. Coracini, 2022 The 2020 hospital series followed surgery, which shapes its results. Chen, 2020
The studies are small and used lasers held on or near the skin. More in our guide to red light therapy for pain and inflammation.
What happens in a gout flare, and which joints does it affect?
Gout is inflammatory arthritis caused by urate crystals forming in a joint when uric acid in the blood runs high. The big toe is the most common site; the ankles, knees, elbows, wrists and fingers can also be affected.
Versus Arthritis calls gout "the most common type of inflammatory arthritis". Versus Arthritis The NHS describes "hot, swollen, red skin over the affected joint". NHS
- Length: the NHS says an untreated attack usually lasts 1 to 2 weeks; Versus Arthritis says five to seven days.
- Where: in the 2020 hospital series, toes were affected in 49.41% of men, the ankle in 39.68% and the knee in 34.92%.
- Risk factors: Mayo Clinic lists red meat, shellfish, beer, fructose-sweetened drinks, obesity, untreated high blood pressure, kidney disease and thiazide diuretics. Mayo Clinic
For gout in the knee, see red light therapy for knee pain; for the hands and wrists, our guide to red light therapy for arthritis.
Can red light ease gout pain in the big toe during a flare?
The closest evidence says it may take the edge off: daily laser light gave rapid relief of acute gout pain in the 2006 study. A hot, swollen joint needs a doctor first, so at home light fits best once the joint is settling.
Anyone weighing red light therapy for gout pain can also look at acute pain in general. A 2006 review pooled 9 placebo-controlled trials with 609 people treated within 7 days of a soft-tissue injury. Bjordal, 2006
- Result: light beat placebo in 15 of 18 outcome comparisons.
- Improvement: people were 2.7 times as likely to report feeling better.
- Dose: the trials that worked treated 3 or more points, with a total of 5.0 to 19.5 J.
A 2017 review calls inflammation reduction "one of the most reproducible effects" of light therapy. Hamblin, 2017 In rheumatoid arthritis of the hands, laser light eased pain and stiffness more than placebo, while swelling was no different. Brosseau, Cochrane 2005 So comfort is a sensible goal for light; swelling is for medicine and ice.
Ice or red light for a gout flare: which comes first?
Ice comes first: it has a randomised trial in gout behind it and appears in NHS and NICE advice. Light is best saved until the flare is settling.
In the ice trial, everyone took prednisone and colchicine, and 10 of the 19 added ice for a week. Schlesinger, 2002 The NHS advises an ice pack or frozen peas in a towel "for up to 20 minutes at a time", plus rest and a raised limb. NHS NICE recommends ice packs alongside medicine. NICE, 2022 Versus Arthritis says "Keep the area cool" and advises against exercise during a flare.
No guideline recommends heat on a flaring joint. Near-infrared light feels gently warm, and a gouty toe is already hot, so comfort sets the pace:
- First 24 to 48 hours: the medicine your doctor advised, ice up to 20 minutes at a time, rest and a raised foot.
- When the heat and swelling start to ease: 5 to 10 minutes, channels dimmed, at 12 inches. Skin should feel warm, never hot.
- Once the flare has settled: the usual joint routine of 10 to 15 minutes at about 6 inches.
A first attack, or a hot joint with a fever, needs a doctor before anything else.
Can red light therapy lower uric acid or dissolve tophi?
Light is studied for pain and joint inflammation, not for uric acid. Lowering urate, which over time lets crystals and tophi shrink, is the job of urate-lowering medicine.
In the 2020 hospital series, urate fell in 96.83% of the surgery group and 93.65% of controls, with no significant difference. Chen, 2020 The ACR strongly recommends urate-lowering medicine for anyone with tophi, joint damage on X-ray, or 2 or more flares a year. ACR, 2020
- ACR target: blood urate under 6 mg/dL.
- NICE target: under 360 micromol/L, or under 300 with tophi or ongoing flares. NICE, 2022
Tophi are lumps of urate under the skin; intact skin over one is skin like any other. Versus Arthritis notes tophi "can sometimes become inflamed, break down and leak fluid". That is broken skin, and our precautions rule out light over broken skin or open wounds.
Which wavelength suits a gouty toe, ankle or knee: red or near-infrared?
Both have a place: 670 nm red light calmed joint inflammation in a crystal arthritis model, and joint pain trials favour near-infrared at 785 to 860 nm. The big toe joint sits close to the surface, so both reach it, while near-infrared does more of the work in an ankle or knee.
A 2019 review of 22 placebo-controlled knee trials with 1,063 people set the recommended dose at 4 to 8 J per spot at 785 to 860 nm, or 1 to 3 J at 904 nm. Stausholm, 2019 At those doses, pain was 18.71 mm lower than placebo on a 100 mm scale.
In animal arthritis, 685 and 830 nm reduced swelling in one model where 628 nm did not. Zhang and Qu, 2023
Our article on 660 nm vs 850 nm compares the two colours.
What settings did the gout and joint light studies use?
The gout studies used contact lasers daily, for 5 days in people and up to 21 days in rats. Joint pain trials more often used 2 to 3 sessions a week for 3 to 6 weeks.
| Study | Light | Dose | Sessions a week | Course |
|---|---|---|---|---|
| Soriano 2006, acute gout | Laser on the joint | Not given in the summary | Daily | 5 days |
| Bartoli 2021, rats | 670 nm laser over the knee | Not given in the summary | Daily, from 48 hours | Up to 21 days |
| Brosseau 2005, rheumatoid arthritis | Lasers on the hands | Varied | 2 to 3 | 4 weeks |
| Stausholm 2019, knee osteoarthritis | 785 to 860 nm or 904 nm lasers | 4 to 8 J or 1 to 3 J per spot | Mostly 2 to 3 | 3 to 6 weeks |
For the ankle, the World Association for Laser Therapy suggests 8 J over 2 to 4 points, daily for two weeks or every other day for three to four weeks. Our guide to red light therapy for hands and feet has its full small-joint table.
No gout study used an LED panel, so the distances below come from the panel's manual. What carries over is the pattern: regular sessions on bare skin over the joint.
Can red light replace colchicine, allopurinol or anti-inflammatory tablets?
No: guidelines name colchicine, anti-inflammatory tablets or steroids for flares and urate-lowering medicine to prevent them. Light belongs alongside these, not in their place.
The ACR strongly recommends colchicine, NSAIDs or steroids as first-line flare treatment, and NICE offers the same three. Cleveland Clinic says colchicine works best "at the first sign of a gout attack starting". Cleveland Clinic
Ibuprofen and naproxen, both common flare medicines, and several diuretics appear on lists of medicines that can make skin more sensitive to light, mostly to UV. Our precautions rule out use with photosensitising medication, so anyone taking a medicine should check with their pharmacist or doctor before using the device. See is red light therapy safe for the full list.
How soon could you notice a change, and how do you tell it from the flare settling?
A flare eases on its own over days, so judge light on how the joint feels in the weeks after a flare. In knee pain trials, the biggest differences from placebo appeared 2 to 4 weeks after the course ended.
That peak was 31.87 mm less pain than placebo on a 100 mm scale. Stausholm, 2019 Cleveland Clinic says "Gout attacks usually last a week or two", so relief within days of a flare may be the attack running its course. Log morning pain out of 10 and the day of the attack, then review after 3 to 4 weeks.
When does a gouty joint need a doctor before any light?
Always for a first attack that has not been diagnosed, and urgently for a hot joint with a fever, because a joint infection can look like gout. NICE says that if septic arthritis is suspected, refer immediately.
- Fever or feeling unwell: the NHS says to contact a GP or 111 urgently with "a very high temperature" or worsening pain. Mayo Clinic says fever with a hot joint "can be a sign of infection".
- First attack: Cleveland Clinic notes gout can resemble infections that need immediate treatment.
- More joints, more often: several joints at once, or frequent flares, are reasons to review treatment.
- Leaking tophi: broken skin needs medical care, not light.
How do you use a Kivorla panel on a big toe, ankle or knee?
Once the flare has settled, sit with the bare foot about 6 inches from the panel, goggles on, and run near-infrared high and red lower for 10 to 15 minutes per area, 3 to 5 times a week. While a flare is easing, keep it to 5 to 10 minutes at 12 inches with the channels dimmed.
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 670 nm channel matches the red in the crystal arthritis study, and 810, 830 and 850 nm sit inside the 785 to 860 nm range from the knee trials. At 6 inches it puts out at least 1,567 W/m².
- Position: hang it low on a door or wall with the included door hook, pulley, hanging cables and screws, or stand it upright on the floor. Rest the foot raised on a cushion, with nothing pressing on the toe.
- Big toe: toes pointing at the panel; light the top of the foot, then turn the foot so the inner side of the big toe joint faces the light.
- Ankle: outer side, then inner side. Knee: panel at knee level, front then inner side, one knee at a time.
- Channels: 810, 830, 850 and 1060 nm high; 630, 660 and 670 nm lower; 480 and 590 nm at their lowest setting.
- Skin: bare skin, socks off. The surface stays at or below 40°C; warm is fine, hot means stop.
As a flare eases, stay gentle: the timer starts at 1 minute, each channel dims below 100%, and stepping back to 12 inches softens the warmth. If no time is set, the panel stops at 5 minutes. Leave at least 6 hours between 30-minute sessions.
Do not use the panel if you are pregnant, breastfeeding or preparing for pregnancy, have epilepsy or light-triggered seizures, have a thyroid condition or take thyroid medication, take photosensitising medication, have had sunburn on your body in the past 2 weeks, or have Fitzpatrick skin type V or VI. Goggles and a controller are included.
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 gout. See a doctor for a first attack, a hot joint with a fever or frequent flares, and keep taking the flare and urate-lowering medicine your doctor has prescribed.