Osteochondritis are lesions that usually cause pain, inflammation, and stiffness of the ankle joint. Osteochondritis can affect all age groups and is usually caused by a twisting-type injury to the ankle. 

Symptoms usually include pain and swelling. Treatment can be as simple as immobilization of the foot and ankle for a period of time. In more severe cases, surgery may be prescribed. The surgical procedure consists of removing loose fragments of cartilage and bone from the ankle joint. In some cases, small drill holes are made to stimulate new blood vessels and help form scar tissue that will fill the holes.