Flat feet occur when the normal foot arches have partially or completely collapsed
Also called pes planus or fallen arches, it is a postural deformity in which the arches of the foot collapse, particularly the inner arch with the entire sole of the foot coming into complete or near-complete contact with the ground
Children with flat feet, have a flattening of the arch during standing and walking. Flat foot is normal in infants and young children (up to 44% of three- to six-year-olds). At this age, in the absence of any associated symptoms, treatment is highly debatable.
Flat foot usually naturally corrects itself as muscles strengthen and soft tissues stiffen. The height of the arch in the foot increases with age until about nine years.
The problem is when flat foot persists, spontaneously occurs in older children or later in life, or is associated with pain and disability.