Why are my horse’s legs swollen after standing still for a long time?

Read time: 3 minutes

Overview

If your horse’s legs swell up after standing still for a long time, it’s often what owners call stocking up. In many cases, this is a fluid build-up linked to reduced movement, and it may ease once the horse starts walking around. There can be other causes too, so it’s worth checking the legs carefully rather than assuming it’s nothing.

Things To Check

1. Check whether the swelling is on one leg or both, and whether it’s even or uneven.

2. Feel for heat, soreness, or a stronger pulse in the lower leg and foot.

3. Look for any cuts, scratches, scabs, mud fever signs, or discharge.

4. Notice whether your horse is stiff, short-striding, or less willing to move.

5. Think about how long your horse has been standing in a stable, trailer, or lorry.

6. Check whether the swelling goes down after turnout or a bit of controlled walking.

7. Review recent changes in turnout, exercise, bedding, travel, or box rest.

Common Causes

The most common reason is simple fluid build-up from standing still for too long. Horses are designed to move, so lack of movement can make the lower legs look puffy.

It can also happen after travel, box rest, or a spell of reduced exercise, especially if the legs look normal again once the horse has been moving.

Sometimes the swelling is linked to mild skin irritation, a knock, or inflammation in the leg. Less commonly, it may be part of a more serious issue such as infection or lameness-related swelling, which is why it’s important to keep an eye on how the horse is moving as well as how the legs look.

What To Do

If your horse seems otherwise well, start by giving them a gentle walk and see whether the swelling reduces. Regular movement through turnout or controlled exercise often helps.

Keep the legs clean and dry, and check them daily so you can spot any change early. If your horse is stabled for long periods, make sure their routine includes sensible movement where possible.

It can help to note when the swelling appears, how long it lasts, and whether it comes back after standing still. That makes it easier to spot a pattern and decide if it’s just a routine stocking up pattern or something that needs more attention.

When To Contact A Vet

Speak to your vet if the swelling is sudden, hot, painful, only in one leg, or comes with lameness. You should also get advice if it doesn’t improve with movement, keeps returning without a clear reason, or your horse seems unwell.

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