The posterior tibial tendon is one of the most important supporting structures of the foot. It helps to stabilize the ankle and hold up the arch. If the posterior tibial tendon fails, the arch can collapse, leading to foot pain, ankle pain and difficulty walking. Posterior tibial tendonitis is a frequent cause of pain at the inside of the ankle.
The tarsal tunnel is a narrow space that lies on the inside of the ankle next to the ankle bones. The tunnel is covered with a thick ligament (the flexor retinaculum) that protects and maintains the structures contained within the tunnel—arteries,veins,tendons,and nerves.One of these structures is the posterior tibial nerve,which is the focus of tarsal tunnel syndrome.
Heel pain is most often caused by plantar fasciitis—a condition that is sometimes also called heel spur syndrome when a spur is present. Heel pain may also be due to other causes, such as a stress fracture, tendonitis, arthritis, nerve irritation, or, rarely, a cyst. Because there are several potential causes,it is important to have heel pain properly diagnosed. A podiatric foot and ankle surgeon is best trained to distinguish between all the possibilities and determine the underlying source of your heel pain.