What causes rain rot to keep coming back on my horse?

Read time: 3 minutes

Overview

Rain rot can keep coming back when the skin stays damp, the coat is not fully dried, or the conditions that favour it are still there. It can also return if grooming tools, rugs or stable kit are reintroducing irritation or bacteria, or if the horse has a skin issue that makes the area more prone to flare-ups.

This doesn't always mean something serious is going on, but repeated episodes are a sign to look at your horse's routine, turnout, coat care and skin condition more closely.

Things To Check

1. Check whether the problem appears after wet turnout, rain, washing, sweating or rugging.

2. Look closely for scabs, matted hair, damp patches, redness, crusting or areas that seem sore.

3. Check whether the same spots keep returning, especially over the back, rump, neck or where water sits on the coat.

4. Think about whether grooming brushes, cloths, rugs or tack have been shared or not cleaned recently.

5. Check if your horse is getting fully dry after rain, bathing or exercise.

6. Look at the overall skin condition. A very greasy, dirty or very damp coat can make repeated flare-ups more likely.

7. Check whether flies, rubbing, itching or scratching are also part of the picture, as these can irritate the skin further.

Common Causes

The most common reason rain rot keeps returning is ongoing moisture. If the coat stays damp for long periods, the skin can become more vulnerable and scabs may keep reappearing.

Poor drying after rain, washing or exercise is another frequent cause. Even if the skin looks better for a while, the same wet conditions can bring the problem back.

Dirty grooming kit, rugs or tack can sometimes contribute by irritating the skin or spreading material between affected areas. Repeated friction from tack or rugs can also make healing slower.

Some horses are simply more prone to skin flare-ups, especially if they have sensitive skin, a thick winter coat or a routine that leaves the skin damp for long periods.

Less commonly, another skin issue may be involved at the same time, such as irritation from insects, rubbing or another surface infection. If it keeps recurring despite good care, that needs a proper look.

What To Do

Keep the area as clean and dry as you reasonably can. After wet turnout, rain or exercise, make drying part of the routine rather than leaving the coat to air-dry if it's staying damp.

Groom gently and avoid picking at scabs too aggressively, as that can make the skin more irritated. If the horse is muddy or sweaty, a careful wash routine can help, but only if you can dry the coat properly afterwards.

Wash or replace dirty grooming kit, and check rugs and tack for rubbing points or trapped moisture. Try to reduce repeat exposure to wet, muddy conditions where practical, especially while the skin is healing.

If the same patches keep coming back, note when it happens, what the weather was like and what changed in the horse's routine. That pattern can make it easier to spot the trigger.

When To Contact A Vet

If the areas are spreading, very painful, hot, swollen or oozing, or if your horse seems unwell, speak to your vet. It's also sensible to get advice if the problem keeps returning despite good hygiene and drying routine, as your vet can check whether something else is contributing.

Products That May Help

If your horse's coat and skin are prone to getting greasy, damp or dirty, a gentle wash routine can be useful as part of day-to-day management. This collection may help support regular grooming without being too harsh on sensitive skin.

Shampoos & Washes

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