What should I do if my horse’s skin is crusty and sore under the coat?
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Overview
If your horse has crusty, sore skin under the coat, rain scald is one possible cause, especially after wet weather or if the coat has stayed damp for long periods. It’s worth checking the area carefully, as similar-looking skin changes can also happen with irritation, infection or rubbing.
Things To Check
1. Check whether the soreness is linked to rain, turnout, sweating, washing or a rug rubbing the area.
2. Look for small scabs, crusting, hair loss, redness, damp skin or tender patches under the coat.
3. Feel for heat, swelling or areas that seem more painful than the rest of the coat.
4. Check whether the problem is limited to one patch or spread over the back, neck, face or rump.
5. Note whether your horse is itchy, sensitive to grooming, or uncomfortable when a rug is removed or replaced.
6. Think about recent changes in weather, turnout conditions, bedding, grooming routine or rug fit.
7. Look at the surrounding skin for broken areas, discharge or a stronger smell than usual.
Common Causes
Rain scald is a common reason for crusty, sore skin under the coat, especially when the coat stays damp for long periods. Wet weather, a heavy coat and limited drying can all make it more likely.
Rug rubbing, sweat, mud or repeated washing can also leave the skin irritated and scabby. In some horses, a skin infection, lice, mites or an allergy-type reaction may look similar, so it’s not always possible to tell just by looking.
What To Do
Start by gently removing any mud or loose debris and keeping the area as dry as you can. If the horse is rugged, check the fit and make sure the rug isn’t trapping moisture or rubbing the same patch.
Avoid picking at scabs or scrubbing the skin, as that can make it more sore. Keep grooming light around the affected area and monitor whether it’s spreading, improving or getting more tender.
If the skin is damp, try to improve drying conditions with shelter, clean bedding or turnout adjustments where possible. It can help to keep a simple note of when the soreness appears, especially if it seems linked to wet weather or exercise.
Products That May Help
When a horse’s coat and skin need a gentler routine, a suitable wash can be useful as part of day-to-day coat care and keeping the area clean without overhandling it.
Related Questions
How do I tell rain scald from mud fever?
Should I keep my horse in or out if the skin is crusty?
Can I wash the area if my horse’s skin is sore under the coat?
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.