What should I do if a sarcoid starts to smell bad?
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Overview
If a sarcoid starts to smell bad, it usually means the skin over or around it has become moist, irritated, broken down, or contaminated with discharge. It’s worth checking promptly, because smell often goes along with changes that need closer attention, even if it doesn’t mean anything serious on its own.
There can be several reasons for the smell, including rubbing, wet or dirty skin, secondary infection, or the sarcoid changing in appearance. You can check a few practical things yourself, then decide whether it’s time to speak to your vet.
Things To Check
1. Look for any discharge, wetness, crusting or scabs around the sarcoid.
2. Check whether the skin is red, warm, swollen or sore to touch.
3. Notice if the smell gets worse after turnout, exercise or sweating.
4. See whether flies, mud, bedding or stable dirt may be irritating the area.
5. Check if the horse has been rubbing, scratching or knocking the area on rugs, fences or tack.
6. Look for any change in size, colour, texture or shape compared with before.
7. Make a note of whether the smell is coming from the sarcoid itself or from nearby skin or hair.
Common Causes
The most common cause is trapped moisture or dirt on the surface, especially if the sarcoid is in a place that gets rubbed or stays damp.
Another common reason is a breakdown of the skin over the sarcoid, which can lead to discharge and an unpleasant smell.
Fly irritation, sweating, or repeated friction from rugs, tack or movement can also make the area smell more noticeable.
Less commonly, there may be a secondary skin infection or a sarcoid that is changing and becoming more vulnerable at the surface.
What To Do
Keep the area as clean and dry as you reasonably can without over-handling it.
Remove mud, sweat or debris gently if the horse will tolerate it, and avoid harsh scrubbing or repeated picking at scabs.
Make a simple note of the smell, any discharge and any change in the sarcoid’s appearance so you can track whether it is improving or worsening.
If flies are an issue, reduce exposure as much as possible and keep bedding, turnout and nearby skin as clean as you can.
Avoid applying random creams or home remedies unless your vet has already advised them, because some products can irritate sarcoids further.
When To Contact A Vet
Contact your vet if the smell is strong or getting worse, if there is discharge, bleeding, swelling, heat or pain, or if the sarcoid seems to be changing quickly. It’s also sensible to ask for advice if the area is repeatedly getting sore, wet or contaminated, because sarcoids can be difficult to manage without a clear plan.
If the horse seems unwell, unusually uncomfortable, or the area looks infected, don’t wait and see for long.
Related Questions
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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.