Knee inversion calf outversion is a typical X-shaped leg, which can be treated with medication, brace correction, surgery, etc. according to age, severity and cause. 1. Medication: If this phenomenon occurs in infancy, it is often due to rickets caused by the lack of vitamin D and calcium, and infants and young children should be given vitamin D and calcium supplements in a timely manner, such as calcium carbonate, calcium gluconate, vitamin D and so on. 2. Brace correction: If X-shaped legs have been formed in childhood and are more serious, it is necessary to take external brace fixation, and X-shaped legs can be gradually corrected by wearing the brace for a long time. 3. Surgery: If the patient’s bones are already formed and the X-shaped leg is more serious, surgery is often needed, such as osteotomy and orthopedic surgery. Patients with knee valgus and calf valgus should go to the hospital in time and cooperate with the doctor to take diagnosis and treatment.