As long as the feet are pain free, flexible and able to fit well in a shoe, no treatment is required though some physiotherapists recommend orthotics. In some cases of flat foot, there is tightness of the Achilles tendon, and these would benefit from stretching.

Very rarely, there is a fixed deformity and you doctor will perform a comprehensive exam and request X-rays to rule out certain conditions. Cases of fixed flat foot often require casting +/- surgery. In late childhood, if severe pes planus is leading to pain, ulceration or callosities (hard skin) on the inside of the foot then surgery would be considered.