In a standing position, most people’s feet have a gap where the inner part of the foot (the arch) is raised off the ground. The height of this arch varies from person to person.
Some people’s feet, however, have a low arch or no arch at all, and this is referred to as flat feet or fallen arches. When someone with flat feet stands, their inner foot or arch flattens and the foot may roll over to the inner side.
Some people with flat feet never have any trouble or pain. Others may suffer from aching feet or find that it can put a strain on the connecting ligaments and muscles, which causes pain in the leg joints when walking.
