Collapsed arches, also known as flat feet or fallen arches, occur when your foot has little or no arch at the midpoint of the feet. Feet with an arch use several tendons in the foot and leg to form and support the arch in the food. Collapsed arches appear when those tendons are not forming the right tension. When walking, people with collapsed arches walk with their whole sole touching the floor instead of just the ball of the foot and the heel.
Arches form as you develop through childhood as all babies are born with flat feet. For some people, however, arches do not develop, leaving the person with flat feet. For others, they may develop normal arches throughout childhood, but they may experience collapsed arches later in life. One or both feet can have collapsed arches as the tendons supporting the arch get damaged or become worn over time. Typically, collapsed arches are not a cause for concern and are treatable with physical therapy and supportive devices. In addition, collapsed arches are fairly common, affecting 25% to 30% of adults.