Anyone who has walked an older dog along the Thames path in Weybridge on a damp autumn morning knows the look: the slow rise from the bed, the careful first few steps, the way a once-bouncy Labrador now thinks twice before hopping into the car. Cats do it too, quietly abandoning the top of the wardrobe for a spot on the sofa they can reach without a leap.

Watching a pet stiffen up is hard, and most owners want to do more than hand over another pill. That’s why light therapy, once confined to veterinary clinics and physiotherapy rooms, is getting so much attention from people looking after aging or recovering animals at home. But does it actually help? Here’s what it is, what the evidence says, and how to decide whether it’s worth trying for your own pet.

What Light Therapy Actually Is

Light therapy, known in veterinary medicine as photobiomodulation or low-level laser therapy, uses specific wavelengths of red and near-infrared light applied to the skin over sore joints, muscles, or healing tissue. The light is absorbed by cells and is thought to boost energy production, improve local blood flow, reduce inflammatory signalling, and calm irritated nerves.

It isn’t heat therapy, and it isn’t a surgical laser. The devices used on pets are low-intensity, non-invasive, and painless. Most animals settle down within a session or two, and many seem to find it relaxing.

What the Research Shows

The evidence base has grown steadily, particularly for osteoarthritis. A randomised controlled trial published in 2025 followed dogs with severe osteoarthritis over ten laser sessions across four weeks. The treated dogs showed significant improvements in lameness, pain, and joint mobility compared with a sham-treated control group, with scores on the Helsinki Chronic Pain Index falling by roughly 38%, alongside measurable reductions in inflammatory and muscle-damage markers in their blood.

That’s one study, and the sample was small, but it sits alongside a growing body of veterinary research pointing in the same direction: for chronic joint pain in particular, light therapy appears to offer real, measurable relief.

Conditions It May Help With

Vets most commonly use light therapy as a supporting treatment for:

• Osteoarthritis and general age-related joint stiffness
• Hip and elbow dysplasia
• Soft-tissue injuries such as sprains and strains
• Post-surgical recovery and incision healing
• Chronic wounds, hot spots, and lick granulomas
• Back pain, including intervertebral disc disease in dogs
• Gum inflammation in cats and dogs

It’s rarely a standalone cure. Its value is in reducing pain and inflammation enough that a pet moves more, sleeps better, and needs less medication.

Why Home Use Has Taken Off

Clinic-based laser therapy works well, but it typically means multiple visits a week, which is stressful for anxious pets and expensive for owners. Home devices change that equation. They allow short, regular sessions in a calm, familiar setting, at a time that suits the animal rather than the appointment book.

The technology has also become far more accessible. Devices designed specifically for companion animals are now compact, cordless, and simple enough for owners to use confidently after a brief demonstration. The Medcovet Luma is one example built with home use in mind: a handheld red and near-infrared device intended for pets, with preset session times and a design that lets owners treat a hip, shoulder, or healing wound while the animal rests beside them.

Used as part of a veterinary-guided care plan, a device like this can make it easier for owners to maintain a consistent treatment routine at home.

How a Typical Home Session Works

Most owners find a routine settles in quickly:

• Choose a quiet moment, often after a walk or before bed
• Hold the device lightly against or just above the target area
• Move slowly across the joint or muscle for the recommended time, usually a few minutes
• Repeat several times a week initially, then reduce as your pet improves
• Keep notes on mobility, appetite, and mood so you can track changes

Sessions are painless, and many pets begin to associate the device with attention and relaxation.

Safety and Sensible Limits

Light therapy is considered very safe when used correctly, but a few precautions apply:

• Always speak to your vet first, particularly if your pet has a diagnosed condition or is on medication
• Avoid using light over the eyes, over tumours or suspected growths, or on pregnant animals
• Follow the device’s guidance on duration and frequency; more isn’t better
• Don’t use it as a reason to skip veterinary check-ups or delay investigation of new symptoms
• Stop and seek advice if your pet shows discomfort or the area looks irritated

Used within those limits, it’s one of the lower-risk supportive therapies available.

Setting Realistic Expectations

Light therapy won’t reverse arthritis or regrow cartilage. What it can do is take the edge off pain and inflammation so that other measures, such as weight management, joint supplements, gentle exercise, and prescribed medication, work better together. 

Some pets show clear improvement within a couple of weeks; others take longer or respond more subtly. Consistency matters more than intensity, and the animals who benefit most tend to be those whose owners stick with a regular routine.

Conclusion

Light therapy has moved from the clinic to the living room for good reason: the research increasingly supports its ability to ease joint pain and inflammation, it’s gentle enough for daily use, and it fits naturally into the calm, familiar environment where pets feel safest. It won’t replace your vet, and it shouldn’t, but as part of a broader plan, it can help an aging dog get up a little easier or a recovering cat settle a little sooner. 

If you’ve been watching your pet slow down and wondering whether there’s more you can do at home, this is one option that deserves a proper conversation with your vet.

Disclaimer: The information provided in this article is for educational purposes only and is not a substitute for professional veterinary advice. Always consult your veterinarian before starting any new treatment or therapy for your pet, especially if they have underlying health conditions or are on medication. Individual results may vary, and light therapy should be used as part of a comprehensive care plan.