How can you treat swelling in your horses leg?

There are several things you can do to treat swelling. The first thing is to find out why your horse's leg is swelling, and you should call your vet. He or she will be able to suggest the proper treatment depending on the problem. Some possible recommendations would be hosing with cold water, wrapping with a standing bandage (DO NOT do this unless you have been taught how or you can cause further damage), poultices, sweats, administering an anti-inflammatory medication. If it's something simple, like your horse's ankles swelling a bit after standing in a stall, he or she may suggest just turning out or exercising your horse more. Or if it's an injury, you may have to, instead, keep your horse in a stall with limited time exercising. But the most important thing is to find out the cause of the swelling first. Call your veterinarian!