Why are my horse’s legs swollen on both sides? | arlo.® Atlas
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Overview
If your horse’s legs are swollen on both sides, it’s often stocking up, which is a common fluid build-up in the lower legs, especially after standing in for a while. It can look worrying, but it’s often linked to reduced movement rather than a serious problem. Even so, it’s worth checking for heat, pain, lameness or skin changes, because not every swollen leg is simple stocking up.
Things To Check
1. Check whether the swelling is in both legs or all four, and whether it goes down after turnout or exercise.
2. Feel the legs for heat, tenderness or any obvious difference between one side and the other.
3. Look for cuts, mud, scabs, insect bites or other skin irritation that could explain the swelling.
4. Watch how your horse walks and turns, and note any stiffness, uneven steps or lameness.
5. Check whether the horse has been box-resting, travelling, standing still for long periods or has had a quieter routine than usual.
6. Look at the overall condition of the legs and whether the swelling feels soft and puffy or firmer and more localised.
7. Take note of any other signs such as dullness, a raised temperature, reduced appetite or general discomfort.
Common Causes
The most common cause is stocking up from reduced movement, especially overnight or during box rest. It often affects both legs and may improve once the horse has moved about.
Less commonly, swelling on both sides can be linked to muddy turnout, minor skin irritation, low-grade inflammation, or a reaction to standing still for long periods. Tightly fitting bandages or stable management issues can sometimes contribute too.
If the swelling is accompanied by heat, pain, lameness or sores, there may be a different underlying issue that needs a closer look.
What To Do
Start by giving your horse a proper check and making a note of when the swelling appears and whether it improves with movement. If the horse is otherwise well and the legs are cool and comfortable, controlled exercise and more turnout time can often help the swelling settle.
Keep the legs clean and dry, and make sure bedding, turnout conditions and stable time aren’t making things worse. If the legs are muddy, a sensible hygiene routine can help you spot changes earlier and keep the skin in better condition.
It can also help to monitor the legs over a few days with photos so you can tell whether the swelling is improving, staying the same or getting worse.
Products That May Help
If your horse is prone to muddy legs, filled legs or general lower-leg care needs, this collection may be useful as part of your daily routine.
Related Questions
Why do my horse’s legs fill up overnight?
Can stocking up be normal after box rest?
How do I tell stocking up from something more serious?
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.