Foot exostosis is a common symptom of pediatric cerebral palsy and refers to an abnormality in the shape or structure of the foot. In normal individuals, the shape of the foot is maintained by relatively symmetrical extrinsic and intrinsic muscles that maintain its balance. Some congenital or disease suspected causes may also cause foot deformity. Ectropion, also known as valgus supination, is an outward heel deviation in children and is one of the common deformities of the foot. It is a deformity caused by abnormal development of the tendons in the foot, accompanied by flat feet and navicular collapse, with the midpoint of the calf, the center of the Achilles tendon and the center of the heel bone in a three-point line. What are the negative consequences of foot ectropion? The collapse of the navicular bone and the arch of the foot, the foot easily fatigue and produce pain, cause ankle joint ectropion deformation, affect the development of the knee joint, and easily cause knee ectropion (x-shaped leg). Treatment: You can take physical therapy, wear orthopedic shoes, with special foot orthopedic insoles. Keep the heel in a vertical position to reduce the chance of interlocking sequelae caused by flat feet. Exercise therapy: 1.Lowering the muscle tone of the triceps and N cord muscles of the calf. 2, squat training, squatting knee flexion 9 degrees, standing knee should be 140-160, avoid knee hyperextension. 3, prone position calf flexion and extension training, improve rouge muscle tone, increase the stability of the knee joint which single and double-legged kneeling position training is conducive to improving knee control ability. 4, crawl training, knee flexion position, is conducive to correcting knee anteversion, while increasing the knee control ability, coordination of its motor ability, knee flexion and extension is dorsiflexion training, improve the strength of the extensor muscle, coordination of antagonist muscle ability. 5, calf triceps retraction and muscle strength training, let the child’s forefoot on the step, the heel put underground, training the child to put down the heel and lift the forefoot heel, for the swing period the most needed strength training. 6.Bridging training to enhance the strength of the extensor muscles, promote hip extension and flexion, and correct trunk forward flexion. 7.Up and down step training, to correct the knee joint recoil and coordinate the pace has a greater role to pay attention to keep the knee joint slightly flexed. 8.Weight-bearing therapy training is good for improving knee stability and increasing proprioception twice a day.