What Does It Mean If My Horse Has Soft Swelling In Both Hind Legs? | arlo.® Atlas
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Overview
Soft swelling in both hind legs often means your horse has stocked up, which is a common build-up of fluid in the lower limbs. It can happen after standing still for a while, especially overnight, and often improves once the horse moves around.
It doesn't always mean anything serious, but it's still worth checking the legs carefully because similar-looking swelling can sometimes have another cause.
Things To Check
1. See whether the swelling is on both hind legs or just one, and whether it looks even from side to side.
2. Check if the legs feel warm, painful, or more sensitive than usual when you touch them.
3. Look for any cuts, scabs, mud fever-type sores, discharge, or broken skin.
4. Notice whether your horse is lame, short-striding, stiff, or reluctant to move.
5. Think about how long the horse has been standing still, such as overnight in the stable or after box rest.
6. Check whether the swelling improves after turnout, hand-walking, or gentle exercise.
7. Look at the rest of the horse for fever, dullness, reduced appetite, or other signs that something more than simple stocking up may be going on.
Common Causes
The most common reason is stocking up, which is usually a temporary fluid build-up linked to reduced movement. Horses that stand in for long periods often show soft swelling in the lower legs, especially the hind legs.
Other common reasons include a muddy or wet environment, mild irritation of the skin, or a knock that has caused local swelling. Poor circulation after confinement can also make the legs look puffy.
Less commonly, soft swelling can be linked to infection, a more significant injury, or an underlying problem affecting the limb or general health. That’s why it helps to keep an eye on how quickly it appears and whether there are any other signs.
What To Do
Give your horse more movement if you can, as gentle exercise often helps fluid shift down. Check the legs daily so you can spot any change in heat, pain, skin damage or lameness.
If your horse has been stabled for long periods, look at whether turnout, regular hand-walking, or a less restricted routine may help reduce the swelling. Keeping the legs clean and dry can also be useful if the skin is getting irritated by mud or damp bedding.
If the swelling is mild, even, and improves with movement, it may simply be part of a recurring stocking up pattern. If it keeps coming back, jot down when it happens, how long it lasts, and whether anything seems to make it better or worse.
Use common sense and trust what you can see. If something about the swelling doesn't fit the usual pattern for your horse, it's worth getting it checked.
When To Contact A Vet
Contact your vet if the swelling is only in one leg, feels hot or painful, comes with lameness, or doesn't improve after movement. You should also call if your horse seems unwell, has a fever, has broken skin or discharge, or the swelling is getting worse rather than better.
Products That May Help
If your horse is prone to filled legs, muddy turnout or needs regular leg washing as part of day-to-day care, this collection may be useful alongside a sensible routine.
Related Questions
Why do my horse’s hind legs fill up overnight?
How can I tell stocking up from injury?
Does turnout help stocked-up legs?
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.