A popped knee can range from a harmless cosmetic blemish to a painful joint condition. Learn about the anatomy of the equine carpus, common causes of knee swelling, signs of lameness, carpal hygromas, chip fractures, arthritis, veterinary diagnosis, and when a swollen knee requires urgent care.

The equine carpus is one of the most important joints in the horse’s body. Every time a horse gallops, lands from a jump, turns sharply, or even walks across uneven ground, the carpus helps absorb force and stabilize the limb. Because of the tremendous stresses placed on it, the carpus is also one of the most commonly injured joints in athletic horses. Understanding how this joint works can help horse owners better recognize problems early.