Mud Fever in Horses

Causes and treatment for this common wet-weather skin condition

Quick Answer

Mud fever is a skin condition affecting the lower legs, linked to prolonged wet or muddy conditions
Signs include scabbing, crusting, and sometimes swelling on the pasterns and heels
Keeping legs clean and dry, where practical, is central to both prevention and management
Spreading swelling, heat, or lameness needs veterinary attention

Signs of Mud Fever

Scabbing or crusting on the pasterns and heels
Matted hair with discharge underneath the scabs
Swelling around the affected area
Sensitivity or pain when the area is touched
Lameness, if the condition is more advanced or the leg is significantly swollen

What Causes Mud Fever

01 Prolonged wet conditions Main trigger

Standing in mud or wet ground for extended periods softens the skin’s natural barrier, making it more vulnerable to infection.

02 Repeated wetting and drying

Cycles of wet then dry skin, rather than constant moisture, can be linked to cracking and irritation that allows bacteria in.

03 Pre-existing skin damage

Small cuts, abrasions, or irritation from mites can give bacteria an entry point, particularly in already wet conditions.

04 Heavy feathering

Thick feather on the lower leg can trap moisture against the skin, which may be linked to a higher risk in some breeds.

Managing Mud Fever

Reduce time standing in wet mud where possible, using matting or hardstanding at gateways and feeding areas.
Dry legs thoroughly after washing — pat dry rather than leaving them to dry naturally in cold conditions.
Use a barrier cream on clean, dry skin before turnout in wet conditions, as recommended by your vet.
Avoid scrubbing off scabs forcefully — let your vet advise on the best way to clean the area without causing further damage.
Monitor daily during wet spells, since early signs are easier to manage than an established case.

When to Contact Your Vet

Swelling that’s spreading up the leg, rather than staying local to the pastern
Heat in the leg alongside the scabbing
Lameness alongside skin changes
No improvement after a few days of consistent home care
Recurring mud fever each wet season

How Pet Med Direct Can Help

Pet Med Direct stocks barrier creams and skin care products that may support your vet’s recommended management plan for mud fever.

Some treatments require a valid veterinary prescription. Pet Med Direct can only supply prescription medicines after the prescription has been checked. Always follow your vet’s advice and the directions on the product label.

Frequently Asked Questions

Should I clip the feather off affected legs?

This can help in some cases by allowing the skin to dry more easily, but ask your vet whether it’s appropriate for your horse before clipping over active mud fever.

Can mud fever spread between horses?

Mud fever itself is linked to environmental conditions rather than being directly contagious, but shared wet, muddy areas can affect multiple horses independently.

Is mud fever the same as rain scald?

They’re closely related conditions caused by similar factors, but rain scald typically affects the back and upper body rather than the lower legs.

Can mud fever be fully prevented?

It can’t always be avoided entirely in wet climates, but reducing time standing in mud and keeping legs clean and dry significantly lowers the risk.

← Back to Equine Health Hub

Need pet products or prescription medicines? Visit the Pet Med Direct shop.

Shop Pet Med Direct

This this article is for informational purposes only and does not constitute veterinary advice.
If you are concerned with your dog’s health, please consult a qualified veterinarian.