Flatfoot is a condition in which the longitudinal arch in the foot, which runs lengthwise along the sole of the foot, has not developed correctly and is lowered or flattened out.  There are many causes of flatfoot, such as: genetics, rheumatoid arthritis, stroke or diabetes.  Individuals who have flat feet rarely have symptoms, but they might experience pain in the following instances: sudden weight gain, minor injury, incorrectly fitted footwear, changes in work environment or excessive standing, walking, jumping or running.  Treatment for flat feet usually consists of wearing spacious, comfortable shoes with good arch support.  Many times, orthotics are recommended to balance the foot in a neutral position and cushion the foot from excessive pounding.