Why does my horse have hair loss on its face after sun exposure? | arlo.® Atlas
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Overview
If your horse has hair loss on its face after sun exposure, photosensitivity is one possible reason, but it is not the only one. Sun-exposed areas can become irritated, itchy or sore, and hair may rub or fall out if the skin has been affected.
It’s worth checking the pattern, the condition of the skin and whether there are any other changes elsewhere on the body. That can help you judge whether this looks like simple rubbing or a skin reaction that needs more attention.
Things To Check
1. Check whether the hair loss is only on white or lightly pigmented skin, especially around the muzzle, eyes and face.
2. Look for redness, flaking, crusting, scabs, swelling or areas that seem tender to touch.
3. Notice whether it happens after sunny turnout, exercise, or time near reflective surfaces such as pale sand or bright fencing.
4. Check for rubbing against field shelters, gates, rugs, headcollars or fencing.
5. See whether there are any signs of itchiness, head rubbing, stamping or repeated face scratching.
6. Think about any recent changes in feed, plants in the field, medications or skin products.
7. Check whether the eyes, nose or lips also look sore, crusted or unusually sensitive to light.
Common Causes
The most common reason is photosensitivity, where sunlight makes already sensitive skin react and the hair may thin, break or fall out. This can happen for several different reasons, including plant-related triggers, liver-related issues or reactions to substances on the skin.
Simple rubbing is another common cause, especially if the horse is itchy, sweaty or wearing a headcollar, fly mask or tack that sits on the face.
Less commonly, skin infections, mites or other inflammatory skin problems can cause facial hair loss, sometimes with crusting or soreness.
What To Do
Keep a note of when the hair loss appears and whether it worsens after sun exposure. Photos can be useful for spotting changes over time.
Reduce further irritation where you can. That might mean limiting strong sun exposure, checking that tack and headgear fit comfortably, and avoiding anything that seems to rub the area.
Use gentle grooming and avoid harsh scrubbing or products that sting on sensitive skin. If the skin is scabbed or sore, leave it alone rather than picking at it.
If the problem seems linked to sunlight, look at turnout timing and shade access, and speak to your vet if it keeps recurring or if there are signs of deeper skin sensitivity.
When To Contact A Vet
Contact your vet if the hair loss is spreading, the skin is painful or swollen, there are open sores or discharge, or your horse seems generally unwell. It’s also sensible to get advice if you suspect true photosensitivity, because the underlying cause may need proper investigation.
Products That May Help
If your horse's face is feeling sensitive, a gentle wash routine can sometimes help you keep the skin and coat clean without adding extra irritation.
Related Questions
Can photosensitivity cause scabs on a horse's face?
Why is my horse rubbing its face after being in the sun?
How do I tell rubbing from a skin reaction?
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.