Of all foot tendons, the Achilles tendon is the one most likely to rupture. Rupture may occur due to severe strains, for example, while running or playing tennis, or may follow a simple stumble.
Achilles tendon injuries have the advantage of being relatively easy to diagnose: the Achilles tendon hurts. The most common Achilles tendon injuries are Achilles tendinosis (formerly called Achilles tendonitis) and Achilles tendon rupture. Achilles tendon ruptures, also known as tears, can be full ruptures or partial ruptures. A physician may be required to distinguish between acute Achilles tendinosis and a partial Achilles tendon rupture. Tennis Leg is a rupture of the connection between the calf muscle and the Achilles tendon. Achilles tendons can also be injured as a result of medication side effects, laceration or crushing.