Red Light Therapy for Hands and Feet: What the Trials Show

Hands and feet are among the better places to use red light therapy, because the joints and tendons that hurt sit within a few millimetres of the skin, where near-infrared light still arrives. The strongest evidence is for plantar fasciitis: a placebo-controlled trial found pain scores fell 29.6 points against 5.4 with placebo, a pooled analysis of 18 trials found about 13 to 18 mm less pain on a 100 mm scale, and the 2023 US physiotherapy guideline now recommends low-level laser for short-term heel pain relief. For hands, a Cochrane review found light reduced rheumatoid arthritis pain by about 1.1 points and cut morning stiffness by 27.5 minutes, carpal tunnel trials show short-term relief, and finger-joint arthritis has only small studies, most without a control group. Light has not been shown to help numb feet, nail fungus or ageing skin on the hands. Almost every trial used a clinic laser held on the skin, not a panel, and this article says where that matters.

Does red light therapy work for hands and feet?

For some problems and not others. The table sorts the common ones by how good the evidence is.

One point applies to every row. The positive trials used class 3B lasers with the probe on the skin, dosed in joules per point. A home panel is rated in power per area at a distance, and no study converts one into the other. Red light therapy for knee pain explains that gap in more detail.

What does the evidence say for plantar fasciitis and heel pain?

That it reduces pain in the short term, with results from randomised trials, a pooled analysis and a current guideline pointing the same way. The gains are moderate, not dramatic.

Sources: Macias, Cinar, Naterstad. The 2023 revision of the American Physical Therapy Association's heel pain guideline gives low-level laser a Grade B recommendation for reducing pain in the short term, as part of a rehabilitation programme, upgraded from a weaker "may use" in 2014 (APTA 2023). The same guideline gives stretching, manual therapy, taping and night splints its top grade, so light sits alongside those rather than replacing them. For the Achilles tendon the picture is mixed, as red light therapy for pain and inflammation explains.

Does red light therapy help arthritis in the hands?

For rheumatoid arthritis, a Cochrane review found short-term relief of pain and morning stiffness. For osteoarthritis of the finger joints the evidence is thin.

The Cochrane review pooled five placebo-controlled trials with 222 people, most of them treated on the hands two to three times a week for four weeks. Pain was 1.1 points lower on a 10-point scale than with placebo, morning stiffness was 27.5 minutes shorter, and fingertip-to-palm flexibility improved by 1.3 cm. Grip strength and swelling did not change, and the effects were not maintained three months later (Brosseau 2005). For finger-joint osteoarthritis, a Korean study gave 23 people with painful finger joints 18 minutes of 850 and 940 nm LED light twice a week for four weeks; pain fell from 73 to 35 on a 100-point scale, with no change in swelling or range of motion, but there was no comparison group (Kim 2024). That study is worth knowing about because it used LEDs at wavelengths found in home panels, and because its limits show how little is settled. The 2019 American College of Rheumatology guideline for hand osteoarthritis does not mention light therapy at all; it recommends exercise, splints for the thumb base and topical or oral anti-inflammatories, and lists heat and paraffin among the options (ACR 2019).

Does red light therapy help carpal tunnel syndrome?

In the short term. Reviews of the randomised trials find symptom relief in the first five weeks or so, a grip strength gain of about 2 kg, and effects that fade by 12 weeks.

A 2018 systematic review of 17 trials found strong evidence of benefit over placebo in the very short term, moderate evidence at seven weeks and conflicting evidence at 12, concluding that the positive effects tend to subside (Franke 2018). A meta-analysis of eight trials with 631 wrists found grip strength 2.19 kg better with laser than placebo; its pooled pain and symptom scores favoured laser but did not reach significance (Bekhet 2017). Carpal tunnel syndrome that causes numbness, weakness or wasting at the base of the thumb needs a doctor, and splints, steroid injection and release surgery are the standard treatments.

Does red light therapy help trigger finger?

There is no finished trial. One sham-controlled trial of 830 nm laser plus splinting began recruiting in 2025 and has not reported.

Trigger finger is a tendon catching in its sheath, not a joint problem, and the usual care is splinting, a steroid injection or a small release operation. Until the trial reports, there is nothing to say about light beyond that it has not been tested.

Does red light therapy help numb feet or neuropathy?

The sham-controlled trials say no. Numbness in the feet needs a doctor, because its common causes, including diabetes, vitamin B12 deficiency, thyroid disease and medication, need to be found and treated.

Two double-blind trials of infrared light devices for diabetic peripheral neuropathy, one of them with daily 40-minute home use for 90 days, found no difference from sham in sensation, symptoms or nerve conduction (Clifft 2005; Lavery 2008). We mention this because forum threads full of hopeful anecdotes rank highly for this question, and the controlled evidence does not support them. Thyroid disease is also a reason not to use a light device at all under our precautions.

Can red light therapy treat toenail fungus?

No. The lasers studied for nail fungus work by heating the nail bed with high-energy pulses, which is a different process from the low-level light in an LED panel, and even that evidence is weak.

A systematic review of 12 studies found that most used a 1064 nm Nd:YAG laser at high energy, that results conflicted, that the evidence was limited and of poor quality, and that no trial compared laser with antifungal medicines (Bristow 2014). A panel's 1060 nm channel is in the same wavelength region but at a tiny fraction of the energy, does not heat the nail, and has no evidence against fungus. Nail fungus is treated with topical or oral antifungals from a pharmacist or doctor.

Does red light therapy help cold hands or Raynaud's?

Three small Austrian trials found milder Raynaud's attacks during a course of laser sessions, and two of them fewer attacks, with effects that did not last. For ordinary cold hands there is no trial.

In a double-blind trial of 47 people with Raynaud's, ten laser sessions in winter reduced the number and severity of attacks compared with placebo at six weeks and three months (al-Awami 2004), and a crossover trial of 48 people found the same during three weeks of sessions five days a week (Hirschl 2004). The trials are twenty years old, used clinic lasers and have not been repeated. NHS advice for Raynaud's is to keep warm, exercise, avoid smoking and see a GP if attacks are severe or one-sided (NHS). Near-infrared light warms the skin slightly during a session, which is pleasant on cold hands, but that is comfort, not a measured outcome.

Does red light therapy help ageing skin on the hands?

Nobody has tested it there. The trials showing more collagen and fewer wrinkles were done on the face and neck.

Hand skin is thin, has little fat beneath it and gets more sun than almost anywhere else, so it is a reasonable place to expect the same kind of change, but no trial has measured it, and the panel is the only Kivorla device that would reach it since the mask is shaped for the face. Red light therapy for the neck covers the nearest evidence, and red light therapy for the face the collagen trials.

What dose did the trials use on small joints?

Small doses. The World Association for Photobiomodulation Therapy tables give a finger joint 4 joules over one or two points, and a wrist, ankle, carpal tunnel or plantar fascia 8 joules over two to four points, against 12 joules for a knee.

Source: WALT 2010. The tables call for daily treatment for two weeks or every other day for three to four weeks, with 20 to 300 seconds per point and the probe on the skin. Small joints need less because the target is shallow: laboratory measurements show more than 90% of near-infrared laser energy is absorbed within the first 10 mm of tissue (Kaub 2022), which is why finger joints, the thumb base, wrist tendons and the Achilles are within reach and a hip is not. 660 nm vs 850 nm explains which wavelengths reach which depth.

How do you use a red light panel on hands and feet?

Sit close, bare the area, give each surface its own time, and aim at the sore spot from the side the tissue is thinnest.

Hang the panel on a door or wall at a height where you can sit in front of it with your hands or feet about 6 inches from the surface, which is the distance for a joint. Treat palms and then the backs of the hands, or soles and then the tops of the feet, for 10 to 15 minutes each. For heel pain, remember that the fat pad under the heel is roughly 1.5 to 2 cm thick, so the fascia is nearer the skin along the inner arch and where it joins the heel bone, which is where the trials placed their probes; angle the foot so the light reaches the arch rather than only the bottom of the heel. Two to five sessions a week for three to eight weeks is the pattern in the trials. Wear the goggles even though your face is not the target, since you will be sitting in front of a bright panel, and never use it over broken skin. How to set up a red light panel at home covers mounting and distance.

When should you see a doctor instead?

For numbness, weakness, a joint that is hot and swollen, pain after an injury, a foot problem if you have diabetes, or any pain that has not improved after a few weeks.

Heel pain usually settles within months with stretching and support, and the Mayo Clinic lists anti-inflammatories, physiotherapy, night splints, orthotics and, if those fail, injections or shock wave therapy (Mayo Clinic). Hand pain with morning stiffness lasting more than half an hour, or swelling in several joints, should be assessed for inflammatory arthritis, where early treatment matters. Foot ulcers in people with diabetes are a medical emergency for a wound clinic, not something to shine a light on.

Using the Kivorla panel on hands and feet

The panel covers a whole hand or foot at once and has the near-infrared wavelengths the joint trials used. It has not been tested in a trial on hands or feet, and it is not a treatment for arthritis, plantar fasciitis or any condition.

The 9-Spectrum Red Light Therapy Panel runs 480, 590, 630, 660, 670, 810, 830, 850 and 1060 nm, each dimmable from 1 to 100%, with at least 1567 W/m² at 6 inches, of which near-infrared is at least 1200 W/m². Its 640 by 230 mm face is large enough to light both hands or both feet together. The timer runs from 1 to 30 minutes and the panel stops itself after 5 minutes if no time is set, the surface stays at or below 40°C, and goggles, a controller and door-hanging hardware are included. Suggested use is 10 to 15 minutes per area at 6 inches, with at least six hours between 30-minute sessions. The 4-Wavelength Red Light Therapy Mask is shaped for the face and is not for use on hands or feet. The panel is not for Fitzpatrick skin types V or VI, and neither device is for anyone who is pregnant, has epilepsy, has a thyroid condition or takes thyroid medication, takes photosensitising medication, or has broken skin on the area.

Read the precautions before ordering, since returns are accepted within 30 days, less a 10% restocking fee if the device is unopened with its seals intact, or 20% if it is opened but undamaged and complete. Standard shipping to the US, UK and Germany is free.

Kivorla devices are general wellness devices, not medical devices. The trials described here used clinic lasers, and their results do not transfer directly to a home panel. If you have joint pain, numbness or a foot problem, see a doctor first.