Flat feet, also known as fallen arches, are a common condition where the arches of the feet do not develop properly, leading to a flattened foot profile. In infants and toddlers, flat feet are normal, as the longitudinal arch has yet to form. Typically, as children grow and begin standing on their toes, the arch develops and continues to mature throughout childhood. By adulthood, most individuals have fully developed arches.

Flat feet are often associated with excessive pronation, where the ankle bones lean inward toward the centerline of the body. This condition can be observed when shoes worn by children who pronate begin to lean toward each other after being worn for some time.

While many people with flat feet experience no pain or discomfort, some may develop pain in the foot, ankle, or lower leg. If pain occurs, particularly in children, it is essential to have the feet evaluated to prevent further complications.