Q: My son is 7 and has very flat feet. I am concerned that this will cause him problems in the future. Is there anything that we should be doing now for him?
A: If your son has a flexible flatfoot then there is typically nothing to worry about. A kid with flexible flatfoot will have an arch in sitting that will disappear with weight bearing whereas a rigid flat foot will not present with an arch at all. A rigid flatfoot is more likely to cause problems in the future, however not necessarily. It is currently recommended that he stay strong with his foot muscles (go barefoot!).
Reference: Maryse Bouchard, MD and Vincent S. Mosca, MD. Flatfoot Deformity in Children and Adolescents: Surgical Indications and Management. In Journal of American Academy of Orthopedic Surgeons. October, 2014. Vol. 22, No. 10. Pp. 623-632.