Why is my horse’s coat greasy in some patches and scabby in others?
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Overview
Greasy patches with scabs on a horse’s coat are often seen with rain scald, especially after wet weather or if the coat has stayed damp. It can also be linked to other skin irritation, so it’s worth checking the pattern, the weather and how your horse is being kept.
If it is rain scald, the skin can look crusty or scabby in some areas and greasy or matted in others. You can often get a better idea of what’s going on by checking where it’s appearing, how sore it looks and whether there are signs of wet, muddy or sweaty conditions.
Things To Check
1. Check whether the patches appeared after rain, turnout in wet fields, heavy sweating or being left damp after washing.
2. Look closely for scabs, matted hair, a greasy feel, redness, broken skin, heat or any discharge.
3. Note where the patches are. Rain scald often shows on the back, rump, neck or top line, especially where rain sits on the coat.
4. See whether the horse seems bothered by touch, grooming or tack in the affected areas.
5. Check for mud, damp rugs, poor drying after exercise, or rugs that may be rubbing and trapping moisture.
6. Think about whether other horses on the yard have similar skin changes, which can sometimes point to shared environmental factors.
7. Watch whether the patches are spreading, getting thicker or becoming more sore over a day or two.
Common Causes
Rain scald is one of the most common causes, especially when the coat stays wet for long periods. It can leave the skin crusty, scabby and sometimes greasy where the hair starts to clump together.
Skin irritation from moisture, mud, sweat or poor rug fit can look similar. In some horses, the coat may also become greasy if grooming is reduced, the skin is not drying properly, or there is a build-up of dirt and natural oils.
Less commonly, other skin infections, mites or allergic skin problems may cause patches that look scabby, sore or flaky. These can overlap in appearance, so it’s best not to assume it is rain scald if the pattern is unusual or keeps coming back.
What To Do
Keep the affected areas as dry as you reasonably can. If the coat is wet, gently dry it and make sure rugs, grooming kit and bedding are clean and not holding extra moisture.
Handle the area carefully and avoid hard scrubbing, which can make sore skin worse. If loose scabs are present, don’t pick at them forcefully.
Review turnout, shelter and rugging so your horse isn’t staying damp for long periods. Good daily grooming can help you keep an eye on whether the skin is improving or changing.
If the patches keep spreading, become painful, or keep coming back after wet weather, it’s sensible to ask your vet to take a look.
Products That May Help
Keeping the coat clean and comfortable can be easier with products chosen for regular coat care and gentle washing as part of a sensible grooming routine.
Related Questions
How can I tell rain scald from mud fever?
Should I wash scabs off my horse’s coat?
Why does my horse get skin problems after wet weather?
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.