What to Know About Tarsal Tunnel Coalitions

Tarsal tunnel coalitions refer to an abnormal connection between two or more of the tarsal bones, which are located in the back of the foot between the ankle and the arch. These bones are meant to move independently to support walking, balance, and flexibility. When a coalition, meaning a fusion or bridge of tissue, forms between them, it limits that movement and can compress nearby nerves, especially in the tarsal tunnel, a narrow space along the inside of the ankle. This condition is typically present at birth but may not cause symptoms until adolescence or adulthood. Common signs include pain or burning along the inside of the ankle or bottom of the foot, numbness, tingling, stiffness, fatigue with walking, or a flatfoot that worsens over time. Tarsal tunnel coalitions can be diagnosed through physical examination and imaging studies such as X-rays or MRI scans. Treatment depends on severity and may involve anti-inflammatory medications, immobilization, targeted exercise, custom orthotics, or surgical removal of the coalition, if conservative care does not bring relief. Call us for an appointment if you are experiencing these uncomfortable symptoms.