What causes greasy heel to look like mud fever? | arlo.® Atlas

Read time: 3 minutes

Overview

Greasy heel can look like mud fever because both often affect the lower legs and can cause scabs, crusting, redness and sore-looking skin. The two problems can overlap, and muddy conditions, wet skin and irritation can make them look very similar at first glance.

It’s sensible to check the skin closely rather than assume it’s just mud or simple dirt. Several common skin and environmental factors can produce a similar appearance, so the look alone doesn’t confirm the cause.

Things To Check

1. Check whether the area is on the heels, pasterns or back of the fetlock, as greasy heel often affects these lower-leg areas.

2. Look for scabs, crusting, greasy or waxy skin, redness, broken skin, hair loss or discharge.

3. Feel for warmth, swelling or tenderness, especially if the horse is unhappy when the area is touched.

4. Think about recent weather, turnout and ground conditions, especially if the legs have been wet, muddy or damp for long periods.

5. Check whether the horse has been washed recently, clipped, groomed more often, or exposed to sweating and drying cycles.

6. Notice whether more than one leg is involved, or whether the problem is limited to one patch of skin.

7. Watch for itching, stamping or rubbing, which can suggest irritation rather than simple dirt.

Common Causes

The most common reason greasy heel looks like mud fever is that both can create scabby, crusted skin on the lower limbs. Mud, moisture and friction can make the skin look very similar whether the underlying issue is greasy heel, mud-related irritation or another skin problem.

Greasy heel itself can cause a waxy, greasy or crusted appearance, which is why owners sometimes mistake it for mud fever. The skin can look dirty even when the area has been cleaned, especially if hair is matted or scabs are forming.

Other common causes include damp skin, repeated washing, sweating under boots or bandages, and irritation from mud, bedding or grooming. Less commonly, bacterial skin infection, mites or other skin conditions can be involved, which may need vet assessment if the area worsens or doesn’t settle.

What To Do

Start by keeping the area clean and dry, but avoid over-washing or scrubbing, as that can make already sensitive skin more irritated. Pat the legs dry carefully after washing or muddy turnout.

Try to reduce time spent in deep mud or prolonged wet conditions where possible, and keep an eye on whether the skin improves or gets worse over a few days. If the horse wears boots, make sure they are clean and not rubbing the area.

If scabs are lifting, the skin is sore, or you’re unsure whether this is greasy heel, mud fever or something else, make a note of when it started, which legs are affected and what the skin looks like each day. That can help you spot a pattern and gives your vet useful information if you need to ask for advice.

When To Contact A Vet

Contact your vet if the area is spreading, the skin is very sore, there’s swelling or discharge, or your horse seems lame or unwell. It’s also sensible to ask for advice if the problem keeps coming back or doesn’t improve with sensible home care.

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