The most common areas for tendonitis to occur are your elbows, rotator cuff (shoulder), patella (knee), and Achilles tendon (ankle).

Causes of sudden ankle pain without injury include osteoarthritis, flat feet, Achilles tendonitis, and lupus. Learn about other causes here.

The ankle area has fewer fat layers under the skin and is characterized by the anatomical characteristics that tendons and ...

Inflammation of the Achilles tendon, which stretches from your heel to your calf, can result in pain and stiffness at the back of the ankle. This is usually treated with anti-inflammatory ...