A type of tendinitis. The most common injury to the tendon is a strain or "bowed" tendon, so named because of the appearance of a bow shape due to swelling. The most common site of injury is in the superficial flexor tendon between the knee and the ankle. Despite aggressive treatment with anti-inflammatory drugs, physical therapy and rest, horses commonly reinjure the tendon when they go back into competition. Two surgeries are felt to aid horses to come back to racing: tendon splitting at the lesion site to release accumulated fluid and blood, and superior check ligament desmotomy. The latter surgery is designed to reduce forces on the tendon when the horse returns to training and racing.

Tendonitis is inflammation of a tendon. Many times, the tendon tissue is torn. A bowed tendon is a horseman's term for a tendon after a horse has sustained an injury that caused the tendon fibers to be torn, and then healed with "bowed" appearance.