Why is my horse still getting new ringworm spots after treatment?
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Overview
If your horse is still getting new ringworm spots after treatment, the usual reason is that something is allowing it to keep spreading. That could be another infected horse, contaminated brushes, rugs, tack, or surfaces in the stable and yard.
It doesn’t always mean the treatment has failed, but it does mean the source of infection may not have been fully dealt with yet. Ringworm can also take time to settle, so new spots may appear even after treatment has started.
Things To Check
1. Check whether any other horses, ponies or donkeys in contact with yours have scabs, hair loss or circular patches.
2. Look at rugs, girths, brushes, boots, saddle pads and headcollars to see if they were shared or not cleaned during the outbreak.
3. Check stable walls, gates, buckets, tie rings and other touched surfaces for anything that may have been contaminated.
4. Note whether new spots are appearing in areas that rub, get sweaty or stay damp for long periods.
5. See whether the skin changes are truly new lesions or whether old patches are just becoming more obvious as the hair grows back.
6. Check whether treatment was applied exactly as directed and for the full course recommended.
7. Look for any signs the skin is getting more inflamed, sore or widespread rather than slowly improving.
Common Causes
The most common reason is ongoing exposure to ringworm from the environment or another horse. Spores can linger on grooming kit, rugs, fences, stable fittings and other shared surfaces if they haven’t been properly cleaned.
Another common cause is incomplete hygiene around the affected horse. If brushes, headcollars, rugs or tack are reused between horses, the infection can keep moving around the yard.
Sometimes the treatment plan simply needs longer to work, especially if lesions were already established before treatment began.
Less commonly, what looks like ringworm may be another skin problem altogether, such as rubbed skin, bacterial infection, insect irritation or a different fungal issue. A vet may need to confirm what’s going on if the pattern isn’t typical.
What To Do
Keep the affected horse separate from others where possible until the skin is clearly improving and the risk of spread has been reduced.
Use separate grooming kit, rugs and tack for the affected horse, and clean anything that may have been contaminated according to the product instructions and yard routine.
Wash your hands after handling the horse and avoid moving between horses without changing or cleaning clothing and equipment if ringworm is active on the yard.
Keep a simple note of where the spots are, whether they are spreading, and whether new lesions appear after turnout, grooming or exercise. That makes it easier to see if the pattern is improving or not.
If the skin is not settling, or new patches keep appearing despite good hygiene, it’s sensible to speak to your vet so they can review the diagnosis and treatment approach.
Be careful not to clip, brush aggressively or over-wash the area, as that may irritate the skin further.
Related Questions
How long does ringworm usually take to clear in horses?
Can humans catch ringworm from a horse?
Should I isolate a horse with 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.