The medical term for “flat feet” is “pes planus” or sometimes we just call them “fallen arches. You are considered to have flat feet when the arches that give the foot its characteristic shape are flattened so that the whole sole of the foot touches the ground upon standing.
Having flat feet is very common and rarely does it hurt. You can be born with flat feet or you can develop it as you age with wear and tear on the feet while walking on them. Even though flat feet aren’t usually painful, they can cause problems with the alignment of the joints in your legs, particularly the knees and the ankles. Even if this happens, you may have no pain and there will be no treatment required.