tendonitis, which is a tear due to overuse, or other damage to the tendon.long-term use of the feet, which can cause cause the posterior tibial tendon, the primary support structure for the foot arch, to weaken in older age.tarsal coalition, which causes the bones of the foot to fuse together unusually, resulting in stiff and flat feet.nervous system or muscle diseases, such as spina bifida, muscular dystrophy, or cerebral palsy.damage, dysfunction, or rupture of the posterior tibial tendon.stress on the arches of the feet due to excess weight.weak arches, meaning that the arch is visible when a person sits but the foot flattens onto the ground when they stand.genetic factors, as flat feet can pass from parents to children in the genes.being of young age or being an older adult.

developing a condition that can affect the tendons.

having family members with the condition.Some factors that can put a person at risk for the condition may also cause it. The causes and risk factors for developing flat feet are intertwined.

Flat footing