Flat Feet
Flat feet (pes planus) refer to a change in foot shape in which the foot does not have a normal arch when standing.
Flat feet are a common condition. The condition is normal in infants and toddlers.
Flat feet occur because the tissues holding the joints in the foot together (called tendons) are loose.
Most people have normal arches by the time they are adults. However, the arch may never form in some people.
Some hereditary conditions cause loose tendons.
Ehlers-Danlos Syndrome
Marfan Syndrome
People born with these conditions may have flat feet.
Aging, injuries, or illness may harm the tendons and cause flat feet to develop in a person who has already formed arches. This type of flat foot may occur only on one side.
Read more at: https://medlineplus.gov/ency/article/001262.htm
