The main problem with flat feet is that they are in a poor functional position that creates a lot of stress on the foot, knee, hip, and back. This may take years before the symptoms become present but some signs are easily seen early in life. Usually the child does not like to run or “runs funny.” The child has a hard time keeping up with his peers in sports or play. The child will not usually complain of pain but complains of being tired when required to walk any distance. The child starts unconsciously avoiding playing and gravitates toward sitting activities.