Why is my horse’s wound opening up after it started to heal?
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Overview
If your horse’s wound is opening up after it started to heal, the most common reasons are movement, rubbing, tension on the skin, or the wound being disturbed before it has fully closed. Sometimes a wound also looks better for a few days, then reopens if it gets wet, dirty, or irritated. It doesn’t always mean something serious, but it is worth keeping a close eye on.
Wounds on the lower legs, over joints, or in places that get stretched or rubbed are especially likely to reopen. Infection, swelling, or hidden deeper damage can also slow healing, so it’s sensible to check the area carefully rather than assuming it will sort itself out.
Things To Check
1. Look at where the wound is and whether it sits over a joint, movement area, or place where tack, rugs, or fencing could rub it.
2. Check whether the wound has been getting wet, muddy, or dirty, especially after turnout or stabling.
3. Notice if the area is red, warm, swollen, painful to touch, or producing discharge.
4. See whether your horse is licking, scratching, stamping, or otherwise disturbing the area.
5. Check if the edges of the wound are pulling apart when your horse moves.
6. Compare the wound size day by day so you can tell if it is actually opening more or just looking different as the scab changes.
7. Look for any odour, increased heat, or a darkened scab, as these can suggest the wound needs a closer look.
Common Causes
The most common cause is simple mechanical movement. A wound may start to heal, then split again if it’s over a flexing area or the skin is under tension.
Rubbing from rugs, boots, bandages, mud, or stable fittings can also break down the new surface skin and make it reopen.
Wet, dirty conditions may soften the healing tissue and slow the surface from sealing properly, especially on lower limbs.
Sometimes the wound is healing at the top but still has deeper tissue damage underneath, so it opens again when the horse moves.
Less commonly, infection, proud flesh, or a small foreign body in the wound can keep it from closing normally.
What To Do
Keep the area as clean and dry as you reasonably can. If the wound is suitable for gentle cleaning, use a careful, consistent routine and avoid repeatedly picking at scabs.
Reduce rubbing and movement where possible. Check rugs, bandages, turnout conditions, and fencing, and make sure nothing is catching the wound.
Monitor the wound once or twice a day so you can spot changes in size, discharge, swelling, or heat. A quick photo can help you compare progress.
If the wound is in a muddy or wet area, try to manage turnout and stable hygiene so it’s less likely to become soft or contaminated again.
If it keeps opening, seems larger, or isn’t steadily improving, it’s sensible to get it checked rather than waiting for it to settle on its own.
When To Contact A Vet
Speak to your vet if the wound is repeatedly opening, is on a lower leg or over a joint, or if you notice swelling, heat, discharge, a bad smell, increasing pain, or lameness. A wound that is getting larger rather than smaller should also be assessed.
It’s also worth calling sooner if you’re not sure how deep it is, if your horse is due a tetanus booster, or if the wound may need more than basic home care.
Products That May Help
For wounds that need gentle day-to-day care, the right horse care basics can help support a cleaner, calmer routine around cleaning, handling, and monitoring.
Related Questions
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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.