Clubfoot describes a range of foot abnormalities usually present at birth (congenital) in which your baby's foot is twisted out of shape or position. In clubfoot, the tissues connecting the muscles to the bone (tendons) are shorter than usual. Clubfoot most often presents at birth. Clubfoot is caused by a shortened Achilles tendon, which causes the foot to turn in and under. Clubfoot is twice as common in boys. Treatment is necessary to correct clubfoot and is usually done in two phases — casting and bracing.