The arch of the foot is the shape of the foot’s sole. The arch allows the foot to maintain balance while distributing weight across the point of contact with the ground.
Over time the foot’s arch may change. However, a number of problems may affect the tendons and ligaments in the foot. Some conditions may cause an arch to collapse into a fallen arch or tighten into a high arch.
Progressive Flatfoot (Posterior Tibial Tendon Dysfunction)
If this tendon becomes inflamed, overstretched, or torn, you may experience pain on the inner ankle and gradually lose the inner arch on the bottom of your foot, leading to flatfoot.