Flat foot, flexible flat feet


Flexible flatfoot is a deformity of the foot characterized by a partial or total collapse of the arch. The term “flexible” means the arch of the foot is present when not bearing weight. However, the foot is flat when standing. Flexible flatfoot typically begins in childhood and progresses throughout the adult years. As the condition progresses, the tendons and ligaments of the arch may stretch, tear or become inflamed.


Flexible flatfoot is a deformity that may have a genetic predisposition. It can also develop due to injury, illness or prolonged stress to the foot. If developed by adulthood, flexible flatfoot typically is typically a permanent condition.


  • Pain in the arch, ankle, heel or along the outside of the foot
  • Pain along the shin bone
  • Low back, hip or knee pain
  • Over-pronation (rolled-in) ankle