Achilles Tendonitis
The Achilles tendon, the largest tendon in the body, connects the calf muscles to the heel and is used for walking, running, and jumping. Achilles tendonitis is a condition associated with overuse and degeneration. A rupture of the tendon is a tearing and separation of the tendon fibers so that the tendon can no longer perform its normal function. Symptoms include pain, stiffness and swelling along the back of the leg near the heel, and a sudden popping sound, which may indicate a ruptured Achilles tendon.
Fractures 
