What should I do if a sarcoid has opened up? | arlo.® Atlas
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Overview
If a sarcoid has opened up, the main priorities are to keep it clean, avoid fussing with it, and monitor it closely. Sarcoids can look and behave differently, and an opened area may happen after rubbing, trauma, fly irritation or because the lesion has changed on its own.
It’s sensible to keep an eye on it, but don’t try to remove scabs, pick at the tissue, or apply random creams unless your vet has advised them. If it’s bleeding, becoming more sore, smelly, swollen or not settling, it’s worth speaking to your vet.
Things To Check
1. Check whether it started after rubbing, tack contact, field turnout, grooming or a knock.
2. Look for bleeding, discharge, bad smell, swelling, heat, scabbing or increased soreness.
3. Note the size of the opened area and whether it seems larger than before.
4. Check whether your horse is rubbing, stamping, flicking, or reacting when the area is touched.
5. See whether flies, damp conditions or mud are irritating the spot.
6. Make sure the lesion is not being rubbed by rugs, boots, tack or stable fittings.
7. Keep track of any changes in your horse’s comfort, appetite or behaviour.
Common Causes
The most common reason an opened sarcoid becomes noticeable is local rubbing or minor trauma, which can break the surface and make it look worse quickly. Fly irritation, moisture, mud and repeated contact with equipment can also make it harder to settle.
Sometimes sarcoids can ulcerate or change in appearance without a clear trigger. Less commonly, what looks like an opened sarcoid may have another skin issue alongside it, such as a simple wound, infection or another lump that needs checking.
What To Do
Keep the area as clean and dry as you reasonably can. If needed, gently rinse away dirt with clean water and pat it dry carefully, but avoid scrubbing or picking at the tissue.
Try to reduce rubbing from rugs, tack or equipment, and minimise fly irritation and muddy exposure where possible. If the horse is happy to allow it, you can take a clear photo each day so you can spot whether it’s changing.
Handle the area as little as possible, and don’t use home remedies or over-the-counter products unless your vet has said they’re suitable for that specific lesion.
When To Contact A Vet
Contact your vet if the sarcoid is bleeding repeatedly, getting larger, looks infected, seems painful, or is in a place where rubbing is likely to keep reopening it. You should also call sooner if you’re unsure whether it is still behaving like a sarcoid, or if the area looks very different from how it usually does.
If your horse seems unwell, loses condition, or the wound is worsening rather than settling, veterinary advice is appropriate.
Products That May Help
Keeping the area clean and handling it gently can help support day-to-day care while you monitor an opened sarcoid. The Horse Care collection may be useful for routine skin and first-aid management around minor knocks and surface skin concerns.
Related Questions
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Should I cover an opened sarcoid?
How can I stop a sarcoid from getting rubbed?
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.