What should I check if my horse’s swelling is below the fetlock?
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Overview
If your horse’s swelling is below the fetlock, the first things to check are whether it’s both legs or one, whether the leg feels hot or painful, and whether your horse is lame or moving differently. In many horses this can be stocking up, especially after standing in, but there are several possible causes, so it’s worth checking the leg properly rather than guessing.
Things To Check
1. Check whether the swelling is on one leg or both. Stocking up often affects both hind legs, but one-sided swelling can point to a local issue.
2. Feel the leg for heat and compare it with the other legs. A warmer area can suggest inflammation or injury rather than simple fluid build-up.
3. Watch your horse walk on a straight line and turn. Any stiffness, shortness of stride or obvious lameness matters.
4. Look closely at the skin for cuts, mud fever, scabs, rubbing, discharge or insect irritation. Small skin problems can sometimes cause swelling lower down the leg.
5. Check where the swelling sits. Puffiness below the fetlock and around the cannon or pastern may behave differently from swelling that starts higher up the leg.
6. Think about recent turnout, box rest, travel or a change in routine. Swelling is more common after standing still for long periods.
7. Check whether the swelling improves after gentle movement. Stocking up often reduces once the horse has walked or worked in a controlled way.
8. Notice whether your horse seems uncomfortable when the leg is touched, picked up or flexed. Pain is not something to brush off.
Common Causes
The most common cause is simple stocking up, which is usually a soft, puffy fluid swelling linked to reduced movement, especially after box rest, travel or overnight stabling.
It can also be related to mild knock, overexertion or strain, where swelling is more localised and may be a bit warmer or sore.
Less commonly, swelling below the fetlock can be connected with skin infection, pastern irritation, lymphatic issues or an underlying injury that needs checking.
What To Do
Start by comparing both legs, noting the size of the swelling and re-checking it later in the day. If your horse is otherwise well, gentle exercise and normal movement often help with routine stocking up.
Keep the leg clean and dry, and look after any small nicks or scabs promptly. Try to reduce long periods of standing where you can, and keep turnout, stabling and exercise as consistent as possible.
If the swelling is mild and your horse is comfortable, monitoring it over 24 hours can be useful. If it worsens, becomes painful, or does not settle with movement, it needs a proper assessment.
Products That May Help
If the swelling seems linked to mud, wet turnout or routine leg fill, this collection may be useful for everyday leg and mud management.
Related Questions
Is stocking up in horses always a sign of injury?
Can exercise help a horse with swelling below the fetlock?
When should I worry about a swollen leg in my horse?
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.