The calves do not come together, both may be O-legs, may also be X-legs. Here is a simple way to identify it: the patient’s lower limbs are standing upright together, and the patient should try to consciously close the lower limbs together. The inner side of both knee joints should be as tight as possible. If the inner side of both knee joints are not tight and there is a gap between the lower legs, then it is possible to have O-shaped legs. If the patient is able to keep the medial side of both knee joints tight, but there is a gap between the calves, then there may be X-shaped legs. In practice, if the patient can not take this method is not clear or not quite sure, you can go to the orthopedic department of the hospital above the second level for consultation, please ask the doctor to help determine. In addition, it should be noted that if the patient is not satisfied with the shape of their legs, do not take some so-called corrective measures, need to go to the hospital, please ask the doctor to see if their current leg shape needs to be corrected. Because in the clinical situation, the vast majority of such cases do not need any correction, and the so-called corrective measures taken hastily may cause very serious damage to the patient’s normal knee joint.