Tarsal tunnel syndrome is a condition characterized by compression of the tibial nerve in the tarsal tunnel, located on the inner side of the ankle. This compression can result in symptoms such as pain, tingling, numbness, and weakness in the ankle and foot. Risk factors may include injury, flat feet, arthritis, or other anatomical variations. Treatment options may include rest, ice, physical therapy, orthotics, and in severe cases, surgery to relieve the compression on the nerve.