Why does my horse's leg wound keep getting bigger instead of smaller?
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Overview
If your horse's leg wound seems to be getting bigger instead of smaller, proud flesh is one possible reason, especially on lower legs. It can also happen if the wound keeps opening, is staying too wet or dirty, or there’s ongoing swelling around it. It’s worth keeping a close eye on, because leg wounds can change quickly.
Things To Check
1. Look at whether the wound is actually larger, or whether swelling around it is making it look bigger.
2. Check for proud flesh, which often looks like raised, soft, pink tissue filling the wound.
3. Notice whether the wound is being opened again by movement, rubbing, bandages or turnout.
4. See if there is discharge, a bad smell, heat, increased redness or obvious pain when the area is touched.
5. Check whether the leg is staying muddy, wet or dirty, which can slow normal healing.
6. Compare the wound with a photo from a day or two ago, if you have one, because small changes are easy to miss.
7. Look for lameness or more swelling below the wound, which can suggest the area needs closer attention.
Common Causes
The most common reason is proud flesh, which is overgrowth of healing tissue on lower limb wounds. These wounds can struggle to contract normally, so the tissue rises above skin level instead of drawing together.
Another common cause is repeated irritation from movement, mud, flies, dirty bedding or bandaging. If the wound is being disturbed, it may keep breaking down and appear to spread.
Ongoing swelling can also make a wound look bigger, even when the wound edges themselves have not changed much.
Less commonly, infection, a deeper wound than first thought, or a delayed healing problem may be involved. These aren't things you can rule out at home with certainty.
What To Do
Keep the area as clean and dry as you reasonably can. If the wound is suitable for simple first aid, use gentle hygiene and avoid rough handling that could damage healing tissue.
Try to reduce mud, repeated knocking and unnecessary movement where possible. A stable or turnout plan that limits further contamination may help support healing.
Take a clear photo once a day and note any change in size, swelling, heat, discharge or lameness. That record can be very useful if you need to speak to your vet.
If the wound is on the lower leg and seems to be proud flesh, don't try to trim it yourself. That can make things worse if the tissue is already fragile or irritated.
When To Contact A Vet
Speak to your vet if the wound is getting larger, not improving over a few days, or if you can see raised proud flesh. You should also get advice sooner if there is heat, discharge, smell, increasing swelling, lameness, or the wound is near a joint or tendon.
Lower leg wounds often heal differently from other wounds, and some need veterinary management to get back on track.
Products That May Help
If you’re dealing with a wound on your horse’s leg, the Horse Care collection may be useful for routine first aid and sensible day-to-day wound management support.
Related Questions
How do I know if it’s proud flesh?
Can I clean a horse leg wound every day?
Why do lower leg wounds heal more slowly?
Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.