What should I do if my horse’s wound is getting bigger instead of smaller?
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Overview
If your horse’s wound is getting bigger instead of smaller, it’s a sign the area needs a closer look. It may be irritated, contaminated, moving too much, or developing an infection, and some wounds also look larger because the skin around them is swelling.
Start by checking the wound carefully, keeping it clean and protected from further knocks, and watching closely for changes. If it keeps spreading, becomes painful, smells, or starts to ooze, veterinary advice is sensible.
Things To Check
1. Check whether the wound is actually getting larger, or whether swelling around it is making it look bigger.
2. Look for heat, redness, discharge, bad smell, or increased sensitivity when you touch nearby skin.
3. Note whether your horse is lame, stiff, reluctant to move, or more reactive than usual.
4. Think about whether the wound is in a place that bends or rubs, such as a leg, girth area, shoulder, or near tack contact.
5. Check if mud, bedding, flies, or dirty turnout may be getting into it.
6. Look for scabs that keep opening, or edges that seem to separate rather than close.
7. Check whether the horse has been licking, scratching, or otherwise disturbing the wound.
Common Causes
The most common reason is ongoing irritation from movement, rubbing, mud, or repeated contamination, which can stop healing and make the wound seem bigger.
Another common cause is infection, which may bring swelling, heat, discharge, smell, or more discomfort than you’d expect from a simple superficial injury.
Sometimes the wound has been deeper than it first appeared, or there may be bruising and swelling under the skin that becomes more obvious over time.
Less commonly, a wound can keep opening because of poor drainage, trapped debris, fly activity, or repeated knocks in the same spot.
When To Contact A Vet
Contact your vet promptly if the wound is getting bigger, your horse is lame, there’s obvious swelling or heat, discharge is increasing, or the wound is near a joint, tendon, eye, or other sensitive area.
You should also seek advice sooner if your horse seems dull, painful, off feed, or the wound isn’t improving within a day or two of careful cleaning and protection.
What To Do
Keep the area as clean and dry as you can, and gently remove obvious dirt with suitable first aid care without repeatedly scrubbing the wound.
Limit turnout if the horse is likely to pick up more mud or keep opening the skin with movement, and reduce rubbing from rugs, boots, or tack where relevant.
Take a photo and note the wound’s size once a day so you can tell whether it is truly changing.
If the skin around it is swelling, if the wound smells, or if the horse is sore, don’t just wait and hope it settles on its own.
Products That May Help
If you’re dealing with a minor cut, graze, or wound that needs careful day-to-day cleaning and owner management, this collection may be useful alongside good stable hygiene and monitoring.
Related Questions
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Should I keep a horse’s wound covered or uncovered?
What’s the best way to clean a horse wound at home?
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.