The peroneal tendons run on the outside of the ankle just behind the bone called the fibula. Tendons connect muscle to bone and allow them to exert their force across the joints that separate bones. Tendinosis means there are enlargement and thickening of swelling of the tendon. This usually occurs in the setting of overuse, meaning a patient or athlete does a repetitive activity that irritates the tendon over long periods of time.

Common symptoms of ankle tendinitis include pain and stiffness along the tendon, severe pain after exercising, bone spurs, thickening of the tendon or swelling.

Common treatment options for ankle tendinitis include shoe inserts, rest, steroids and anti-inflammatory medication