Posterior Tibial Tendonitis

Often characterized by ankle pain, the tibialis posterior muscle originates in the back of the leg and its tendon runs down the leg and turns underneath the inner ankle bone to attach to the navicular bone on the inner part of the foot. The tendon assists in inverting and plantar-flexing the foot and also helps maintain the arch of the foot. If this tendon is overused, too much tension and force is placed on it, causing it to become inflamed or degenerated.
Weakening of this muscle causes the arch to drop and may cause a flat foot deformity. Other contributing factors may include: obesity, trauma, arthritis, surgery or previous steroid injections

Common symptoms include:
– Pain in the lower leg and ankle area
– Loss of the arch and the ankle rolling inwards
– Tenderness over midfoot during activity