Why does my horse have scaly, crusty skin patches?
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Overview
Scaly, crusty skin patches on a horse are often seen with ringworm, but they can also happen with other skin irritation, hair loss, mud-related skin problems, or rubbing. You can usually start by checking the pattern, spread and whether the skin is sore, wet or itchy.
Ringworm is one possible cause, but you can’t tell from appearance alone. A few simple checks can help you decide whether this looks like a mild coat issue or something that needs a vet’s input.
Things To Check
1. Look at where the patches are. Ringworm often starts as one or more round, patchy areas with hair loss and crusting.
2. Check whether the skin is itchy, sore or warm to the touch. Mild ringworm may not be very itchy, while other skin issues often are.
3. Notice if the patches are spreading or appearing on stablemates, tack contact areas or across different parts of the body.
4. Look for broken skin, discharge, swelling or a damp, weepy surface, as this may point to something other than a dry crusty patch.
5. Think about recent changes such as new turnout, muddy conditions, grooming tools, rugs or contact with other horses.
6. Check whether the horse has had recent clipping, sweating, rubbing or tack pressure in the same area.
7. Note whether any people or other horses have similar skin changes, as ringworm can pass between animals and sometimes to people.
Common Causes
Ringworm is a common reason for round, crusty, scaly patches, especially if there is patchy hair loss.
Skin irritation from rubbing, sweat, tack, rugs or grooming can also leave dry, crusty areas.
Mud, damp bedding or dirty coat conditions may contribute to scurf, crusting or secondary skin irritation.
Less commonly, other skin infections, parasites or allergic skin problems can look similar at first glance.
What To Do
Keep an eye on the patches over the next few days and take clear photos so you can compare any change in size, shape or number.
Avoid sharing grooming kit, rugs, numnahs or tack until you know what is going on, especially if ringworm is suspected.
Keep the area as clean and dry as you can, and use gentle grooming rather than scrubbing crusts off.
If the horse is in muddy or wet conditions, try to reduce prolonged damp on the skin where possible and keep bedding clean.
If other horses or people develop similar patches, or if the area is spreading, it’s sensible to ask your vet for advice.
Products That May Help
If you’re dealing with a skin patch that needs regular cleansing as part of your horse’s routine, a gentle wash can be useful for day-to-day coat care.
Related Questions
Is ringworm in horses contagious to people?
How can I tell ringworm from mud fever or rubbing?
Should I isolate a horse with suspected ringworm?
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.