Man wearing goggles standing beside the Kivorla red light therapy panel in a bedroom

Red Light Therapy for Cats: What Vets Use It For and How to Do It Safely

Red light therapy for cats is used by vets as an add-on for arthritis, recovery after surgery, sore mouths, bladder pain and wounds, usually as short laser sessions in the clinic. At home, a panel can be used gently on a cat's body once a vet has diagnosed the problem, as long as the light stays away from the eyes and the cat is free to walk away. This article covers what vets use it for, what the cat studies found, and how to run safe, short sessions at home.

Does red light therapy work for cats?

Vets use red and near-infrared light in cats for pain and healing, alongside other care. The cat studies are small and mostly about surgery, where cats given laser light needed less extra pain relief; the larger body of dog research is strongest for arthritis.

The research in cats is small: a 2023 systematic review of laser therapy in animals found 45 studies, of which 1 was in cats, so much of the detail on dose comes from dogs and from vets' clinical experience. One of the strongest dog studies in that review was a randomised, placebo-controlled trial in 20 dogs with elbow arthritis, in which the treated dogs needed fewer anti-inflammatory painkillers and had better lameness and pain scores. Animals, 2023 The dog evidence is set out in red light therapy for dogs. Cats are smaller, may be more sensitive to warmth, and are harder to keep still, so dog settings are a guide, not something to copy.

What do vets use red light therapy for in cats?

Mainly arthritis, recovery after surgery, inflammation of the mouth and gums, and lower urinary tract pain. Vets also list wounds, abscesses, nerve injury and hair loss.

Arthritis, pain after surgery, wounds, abscesses, nerve injury and hair loss all appear in the Merck Veterinary Manual's list for animals. Merck Veterinary Manual, 2025 Vets also describe using it in cats with chronic gingivostomatitis, a painful inflammation of the gums, as an add-on to tooth extraction, given through the muzzle in an awake cat. dvm360, 2026

Use How vets describe it Source
Arthritis and stiff joints 8 to 12 J/cm² for most joints; usually 4 to 6 sessions to see a change Today's Veterinary Practice, 2019
After surgery Sessions started days after the operation, as part of rehabilitation Open Veterinary Journal, 2025
Mouth and gums 2 to 8 J/cm²; about 6 to 8 J/cm² through the lips in an awake animal IVC Journal, 2025
Bladder pain (FLUTD) 6 to 10 J/cm² over the lower belly; daily when acute, then every 2 to 4 weeks IVC Journal, 2023
Wounds and abscesses Listed among the standard uses; done in the clinic Merck Veterinary Manual, 2025

Mouth and bladder care belongs in the clinic, so the home advice below sticks to hips, back and limbs.

Can red light therapy help a cat with arthritis?

Arthritis is one of the main reasons vets use light therapy, in cats as in dogs. It sits alongside the pain relief, weight control and home changes a vet recommends.

Arthritis in cats is easy to miss. In a study that X-rayed 101 cats, 74% had degenerative joint disease in the limbs and 41% in the spine, yet owners had noticed lameness in only 1 to 2 cats. Frontiers in Veterinary Science, 2020 Cats often show joint pain by jumping less, grooming less and avoiding stairs rather than by limping. A vet visit to confirm which joints are affected comes first.

A veterinary sports medicine specialist writes that "for most joints, 8 to 12 J/cm² will work well", with daily sessions during a flare, twice a week for 2 to 3 weeks as things improve, and maintenance every 3 to 6 weeks. The same article notes that in small patients such as cats the tissue over a joint is thin, so power or time is adjusted for comfort. Today's Veterinary Practice, 2019

Is red light therapy good for cats after surgery?

The cat trials that exist are about surgery. Cats given laser light needed less extra pain relief afterwards, and an older study found stronger surgical wounds.

All of these used clinic lasers. Light over a fresh incision is your vet's decision, not something to start at home.

How do vets give light therapy to cats?

With a handheld laser moved over the area for seconds to a few minutes, repeated over weeks. The dose is measured in joules per square centimetre (J/cm²).

Merck gives a typical range of about 4 to 50 J/cm², at about 10 to 100 mW/cm², higher for deep joints and the spine, and says eye protection guidelines "should be followed at all times". Merck Veterinary Manual, 2025 Clinics adjust for coat colour, because dark fur and skin absorb more light and warm faster. Today's Veterinary Practice, 2019 Vets check the skin by hand, aiming for "pleasant, gentle warming". Veterinary Practice News, 2019

One practical limit in cats is the travel: the 2022 AAHA pain management guidelines note that repeated clinic visits can limit laser therapy in cats. That is where gentle sessions at home, agreed with your vet, can fit.

Can red light therapy hurt a cat's eyes?

The eyes are the one firm rule. Keep the light on the body and off the face every time.

In veterinary laser practice the only absolute contraindication is "direct or reflected exposure through the pupil onto the retina". Pet goggles rarely stay on, so the advice is to turn the face away and remove metal collar tags that could reflect the light. Veterinary Practice News, 2019 Cats will not wear goggles, so position is the protection.

Cats' eyes are built for low light: a veterinary ophthalmologist explains that cats need only about "16% as bright" light as people to see, and a reflective layer behind the retina sends light back through it a second time. University of Tennessee, 2024 Near-infrared is also invisible, so it does not make a cat squint or look away. More on light and eyes is in is red light therapy safe for eyes.

When should you not use red light therapy on a cat?

Get a vet diagnosis first, and keep the light off tumours, a pregnant cat and open wounds. Light therapy is an add-on to veterinary care, not a substitute for a diagnosis or for pain medication.

  • Lumps and cancer: never over a tumour or an unchecked lump. Merck also lists lymphoma and immunosuppressant medicines.
  • Pregnancy: do not use on a pregnant cat's belly.
  • Open wounds and bleeding: vets treat some wounds with light in the clinic, but at home keep the panel off broken skin and any area that is bleeding.
  • Overactive thyroid: listed as a contraindication, so ask your vet before using light near the neck.
  • Kittens under a year: caution over growing bones.
  • Tattoos: ink absorbs light strongly and can heat up.

The list follows the Merck Veterinary Manual, 2025. See your vet first after recent surgery, or if your cat has kidney disease or takes regular medication.

Can you use red light therapy alongside your cat's pain medication?

Yes, as an addition your vet agrees to. Vets treat light as an add-on to diagnosis and pain relief, not a replacement for them.

In a placebo-controlled trial in 20 dogs with elbow arthritis, the dogs given light needed fewer anti-inflammatory painkillers Animals, 2023, but any change to a cat's medicine is your vet's decision. If your cat takes a light-sensitising medicine, the Merck Veterinary Manual, 2025 advises a lower intensity.

How do you use red light therapy on a cat at home?

Gently: short sessions, the panel well back, the light on the hips, back or limbs, and the cat free to leave at any moment.

  • Let the cat choose: never hold or restrain a cat in front of the light. Put a favourite bed in front of the panel, or sit with the cat on your lap, and stop as soon as it wants to go.
  • Body only: set up so the light falls on the hips, back or a leg, with the head outside the beam or facing away. If the cat turns towards the panel, pause.
  • Keep it gentle: more distance, lower brightness and less time are the safe direction for a small animal. More light is not better, as explained in how much red light therapy is too much.
  • Check the warmth: feel the fur every minute or two. It should be warm, not hot, and dark coats warm faster. Parting the fur helps the light through, as covered in does red light therapy work through clothes.
  • Continuous light: leave pulse mode off as the simple default; the two are compared in pulsed vs continuous red light therapy.
  • Watch afterwards: keep an eye on your cat for a few hours after a session.

That last point matters in cats. A vet case report described cats that were restless and warm over the back for a few hours after strong clinic laser sessions, and the authors advise watching cats for 3 to 4 hours after treatment. Veterinary Record Case Reports, 2024 Those lasers concentrated far more power on a small spot than a home panel does, but the lesson carries over: keep settings gentle, and if your cat seems unsettled, flinches when touched or feels hot afterwards, stop and ask your vet before the next session.

How long and how often should a cat have red light therapy?

Our suggested starting point is about 12 inches from the panel, up to 5 minutes, on one area, 2 or 3 times a week. For the first few sessions go shorter, 2 to 3 minutes at lower brightness, and build up if your cat stays relaxed.

This is a Kivorla suggestion based on our starting point for dogs, not a figure from a cat trial. The distance is about the panel's strength: at 6 inches and full brightness it gives about 157 mW/cm², roughly 9 J/cm² a minute at the surface, so the 8 to 12 J/cm² vets use for most joints would arrive in about a minute, before any loss in the fur. For a small cat, more distance and lower brightness make a gentler session.

Vet clinic (laser) At home (panel, our suggestion)
Time Seconds to a few minutes per spot 2 to 3 minutes at first, up to 5
Distance Close to or on the skin About 12 inches
How often Daily in a flare, then twice weekly, then every 3 to 6 weeks 2 or 3 times a week
Eyes Eyewear or face turned away Light on the body only, head out of the beam

How can you tell if light therapy is helping your cat?

Watch for the everyday things joint pain takes away, such as jumping, grooming and using the stairs. Note how often your cat does each one before you start, then check again every week or two.

A useful log covers how often your cat jumps to a favourite spot, uses the stairs and grooms its back and hips. Vets treating joints usually expect a change after 4 to 6 sessions, and 8 to 10 where several joints are affected or the disease is severe. Today's Veterinary Practice, 2019 Share the notes with your vet, who can judge them alongside any other treatment.

Why does my cat lie in front of my red light panel?

Cats seek out warm spots, and a panel feels warm. It is fine to let your cat sit nearby during your own session, as long as its face stays out of the beam and it does not sleep pressed against the panel.

Can you use the Kivorla panel with your cat?

The 9-Spectrum Red Light Therapy Panel can be used on pets. Our mask is made for human faces, so the panel is the one to use with a cat.

It has nine wavelengths, 480, 590, 630, 660, 670, 810, 830, 850 and 1060 nm, each dimmable from 1 to 100%, so the brightness is easy to lower for a small animal. It delivers at least 1567 W/m² at 6 inches, of which at least 1200 W/m² is near-infrared. The timer runs from 1 to 30 minutes, and the panel stops on its own after 5 minutes if no time is set, which matches the starting session above. The surface stays at or below 40°C. It can stand, hang on a door or mount on a wall, so it can sit low beside a cat bed; placement is covered in how to set up a red light panel at home. Goggles, a controller, a pulley and a door hook come in the box.

If your cat is on your lap, you are in the light too, so wear the goggles. Pregnant owners should not hold a pet in front of the panel. Read the precautions before ordering. Standard shipping to the US, UK and Germany is free. Returns are accepted within 30 days: an unopened panel with its seals intact is refunded less a 10% restocking fee, and an opened panel that is undamaged and complete is refunded less 20%.

Kivorla devices are general wellness devices, not medical or veterinary devices. Ask your vet to diagnose any lameness, pain, lump or change in behaviour before using light therapy on your cat, and keep it as an addition to the care your vet recommends.

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