Condition in which the instep is not arched and the bottom of the foot (plantar surface) is flat, sometimes causing pain and fatigue. Treatment, when needed, is by special shoes or other devices. Also called pes planus.
Abnormal flatness of the sole and the arch of the foot. This condition may exist without causing symptoms or interfering with normal function of the foot. The inner longitudinal and anterior transverse metatarsal arches may be depressed. This condition may be acute, subacute, or chronic.
A condition where the bony arch of the foot decreases in height. When it fully occurs in a flexible foot, it usually doesn’t cause pain or disability. In fact, many ballet dancers have fully flat feet. Pain typically arises when the foot is only partially flat, leading to strain on the foot ligaments.