Most people have an arch, meaning the inner part of the sole of the foot is raised off the ground when standing. For people with flat feet, this part of the sole of the foot is flattened to the ground. This can run in families, but can also be caused by arthritis or a ruptured tendon. Some people with flat feet may not experience any difficulties, but others may feel pain in the foot, ankle or leg. Wearing well-fitting shoes or insoles that support the arch of the foot can relieve discomfort. A podiatrist can help advise further on treatment