Flatfoot (pes planus) is a condition in which the longitudinal arch in the foot, which runs lengthwise along the sole of the foot, has not developed normally and is lowered or flattened out. One foot or both feet may be affected.
Flatfoot may be an inherited condition or may be caused by an injury or condition such as rheumatoid arthritis, stroke, or diabetes.
People who have flat feet rarely have symptoms or problems. Some people may have pain because of:
- Changes in work environment.
- Minor injury.
- Sudden weight gain.
- Excessive standing, walking, jumping, or running.
- Poorly fitted footwear.
Children sometimes have foot discomfort and leg aches associated with flat-footedness.