External rotation of the tibia may lead to the foot outside the eight, X-shaped legs and other conditions, can be corrected by changing the bad posture, training the leg muscles, etc., and may require surgical correction in serious cases. 1. Change bad posture: avoid sitting with legs crossed, kneeling, sitting and other bad sitting postures; women try to wear less high heels. 2. Training leg muscles: such as the inner thigh muscles, calf triceps, sitting on a chair, two hands back support, ankle at an object (can be changed from thick to thin), two knees together, then straight leg up to the level, and then down, 15 to 20 times for a group, each time 3 groups. Sit on the ground with knees bent, knees open, feet opposite each other, arms bent, hands on the inside of the knee joint, press down on the knee joint to the maximum hold for 2 seconds, and then restore. 3. Surgical correction: If the external rotation of the tibia is more serious and lasts for a longer period of time, it will cause the deformation of the leg to become more and more serious, affecting the function of the joint, and the deformity can be corrected by osteotomy surgery, so as to adjust the line of force of the knee joint bones, restore the normal line of force and function, and reduce the possibility of degeneration and damage to the bone and joint. It is recommended that people with external rotation of the tibia should go to the hospital, consult the doctor, and correct the deformity scientifically under the doctor’s guidance.