When is sunburn on a horse serious enough for veterinary advice?
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Overview
Sunburn on a horse is usually a mild skin irritation, but it can become serious if the skin is blistered, very painful, swollen, cracked or looks infected. If your horse’s nose, white markings or other exposed areas are obviously sore, it’s sensible to speak to your vet for advice.
In many cases, the issue is simple sun damage, but similar-looking skin changes can also be caused by rubbing, insect bites or another skin problem. A quick check of the area and your horse’s behaviour can help you decide what to do next.
Things To Check
1. Check whether the sore area is on pink skin, white markings, the nose, around the eyes or any other exposed patch that gets strong sun.
2. Look closely for redness, heat, swelling, peeling skin, crusts, blisters, broken skin or any discharge.
3. Notice whether your horse seems painful when the area is touched, groomed or when a rug or bridle sits over it.
4. See if the horse is head-shy, reluctant to be handled, or rubbing the area more than usual.
5. Check whether the problem appeared after a sunny turnout, long hack, clipping, washing or time in a very bright paddock.
6. Look for other signs that it may be something more than sunburn, such as itching elsewhere, hair loss, multiple affected patches or flies bothering the area.
7. Watch for general changes such as dullness, reduced appetite or obvious discomfort, which would make the problem more concerning.
Common Causes
The most common cause is simple sun exposure on light-coloured or unpigmented skin, especially on the muzzle, face and around white markings.
Sometimes the skin is more likely to burn after clipping, washing, or if the coat is thin and there’s little shade at turnout.
Less commonly, the area may be irritated by rubbing, insect bites, or another skin condition that looks a lot like sunburn at first glance.
What To Do
Move the horse out of strong sun where possible and reduce further exposure while the skin is sore. Shade, turnout timing and sensible use of a fly mask or turnout hood, if suitable for your horse, may help reduce irritation.
Gently keep an eye on the area for a day or two. If it stays mild, avoid over-grooming, avoid products that sting, and keep the skin clean and dry without scrubbing it.
If the skin is improving, that’s reassuring. If it is getting worse, spreading, weeping or making the horse uncomfortable, veterinary advice is appropriate.
When To Contact A Vet
Contact your vet if the sunburn is blistered, broken, very swollen or clearly painful, or if the horse seems unwell, depressed or reluctant to eat. You should also get advice if the area becomes weepy, develops a smell, spreads quickly, or doesn’t start settling within a few days.
It’s also worth calling if you’re not sure whether you’re dealing with sunburn or another skin problem, especially on the face, around the eyes or on any area that is becoming increasingly sore.
Products That May Help
If your horse’s skin is already sore or sensitive, a gentle washing routine can be useful as part of day-to-day care. This collection may help support coat and skin maintenance without overhandling irritated areas.
Related Questions
How can I tell if a horse has sunburn or just irritated skin?
Which horses are most at risk of sunburn?
What can I do to help a horse with a sore white nose in sunny 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.