Foot Conditions A-Z
Posterior Tibial Tendon Dysfunction
Also called “adult-acquired flat foot” and "progressive flatfoot," PTTD occurs when inflammation or damage to the posterior tibial tendon reduces its ability to support the arch. This often results in flattening of the foot, meaning the entire foot touches the floor when you’re standing. Although PTTD usually occurs in only one foot, some people may develop the condition in both feet. It typically will continue to get worse, particularly if it is not treated early.
PTTD is not the same as pes planus, a generic form of flat feet that has a strong hereditary component. PTTD is not hereditary; it is due to a variety of factors described in the next section.