What Happens When Light Therapy Is Added to Standard Wound Care?
If your dog or cat has ever had a wound that needed veterinary care, you may have heard about newer add-on treatments — including devices that shine special light on the wound to help it heal. A new study published in Frontiers in Veterinary Science looked closely at one of these light-based therapies, called fluorescence biomodulation, and found that it did not clearly speed up wound healing in dogs and cats compared to standard care alone.
This is a small but carefully designed trial — only 15 pets were included — so it’s not the final word. But the results suggest that, at least in this study, adding light therapy on top of good standard wound care did not make wounds heal faster or score better on any healing measure the researchers tracked.
Why Researchers Are Exploring Light Therapy for Pet Wounds
Wound healing can be a slow, frustrating process for both pets and their owners. Infections, delayed healing, and repeat vet visits put stress on animals and their families. Because of this, veterinary researchers have been exploring adjunct therapies — treatments that are added on top of standard care in the hope of getting better results.
Fluorescence biomodulation is one such approach. In simple terms, it uses a special light device that activates a gel applied to the wound. The idea is that the light-and-gel combination may help reduce bacteria on the wound surface and encourage the body’s own healing processes. The technology has shown some promise in early human wound care research, which is one reason veterinarians began investigating it for dogs and cats.
How This Study Was Set Up
The study enrolled 15 client-owned dogs and cats that all had wounds requiring treatment. The researchers used what’s called a within-wound controlled design. Think of it like splitting one wound into two zones — one half received the light therapy in addition to standard care, while the other half received only standard care. This approach allowed a direct comparison within the same animal, which reduces the influence of factors like the animal’s age or overall health.
All wounds also received the same baseline care:
- Regular cleaning and infection control
- Pain management
- Dressings changed on a consistent schedule
- Surgical planning when needed
The light therapy treatment was applied weekly on top of this standard protocol.
What the Study Found
No Meaningful Difference in Wound Size Reduction
The primary goal of the study was to measure how much wounds shrank over time. Smaller wounds typically mean faster healing. When the researchers compared the side of the wound treated with light therapy against the side treated with standard care only, they found no significant difference in how much wound area reduced. In plain terms: adding the light therapy did not make the wound close faster.
Healing Scores, Tissue Samples, and Immune Markers All Came Back Even
The researchers also checked several other measures of healing quality. They looked at:
- Clinical healing scores — standardized assessments of how the wound looked and felt
- Histology — microscopic examination of tissue samples (imagine zooming in on the wound cells under a microscope)
- Immunohistochemistry — tests for specific proteins inside the tissue that signal inflammation or repair activity
On none of these measures did the light therapy group come out ahead. The results were statistically similar across the board, suggesting that the treatment did not produce a meaningful biological effect beyond what standard care was already achieving.
What This Means for Pet Owners Considering Wound Treatments
Standard Care Remains Your Foundation
The most important takeaway from this study is also the most reassuring one: the foundation of wound healing — proper cleaning, infection control, pain management, and appropriate dressings — already does a strong job on its own. This trial did not find that light therapy added measurable value on top of that foundation, at least in this small group of animals.
If your pet has a wound and your vet recommends thorough cleaning, antibiotic treatment, and bandage changes, those steps should be your priority. The core of good wound care has not changed.
Questions to Ask If Light Therapy Is Suggested
Some veterinary clinics do offer light therapy devices as an add-on service. Based on current evidence, it’s reasonable to ask your vet:
- What specific benefit is this expected to provide for my pet’s wound?
- Is there strong clinical evidence for this particular device or treatment approach?
- Is standard wound care being fully optimized alongside it?
This doesn’t mean light therapy is never useful — different devices work differently, and research is ongoing. But this study is a good reminder to ask questions and focus first on proven fundamentals.
Signs Your Pet’s Wound May Need Veterinary Attention
Contact your vet if you notice any of the following:
- Swelling, redness, or warmth around the wound that’s getting worse
- Discharge that is yellow, green, or has a bad smell
- Your pet is licking or biting at the wound excessively
- The wound appears to be growing rather than shrinking
- Your pet seems painful, lethargic, or stops eating
Study Limitations Worth Knowing
This trial included only 15 animals, which is a small group. The researchers themselves acknowledged that the small, heterogeneous sample — meaning the animals varied in species, wound type, and other characteristics — limits how broadly we can apply these results. A larger trial with more uniform cases might produce different findings.
It’s also worth noting that fluorescence biomodulation devices vary in how they work, and this study tested one specific approach. The results may not apply to every type of light-based wound therapy.
The Bottom Line
A small but well-designed trial found that adding fluorescence biomodulation (a light-based wound therapy) to standard wound care did not significantly improve wound healing in 15 dogs and cats. The treated and untreated sides of each wound healed at similar rates, with no measurable difference in clinical scores or tissue analysis.
For pet owners, this means that good standard wound care — cleaning, infection control, pain management, and proper dressings — remains the best-supported approach. If a light therapy add-on is ever recommended for your pet, it’s worth having a conversation with your vet about what specific benefit it’s expected to provide based on current evidence.
This article summarizes peer-reviewed research for educational purposes. Always consult with your veterinarian for personalized advice about your pet’s health and behavior.