Patients can detect whether the pelvis is healthy by the following methods: First, observe the appearance: first, let the patient lie flat on the bed and observe whether both lower limbs are equal in length. If they are equal in length, it usually means that the pelvis is relatively healthy. If they are not equal in length, it mostly indicates that there is a pelvic tilt and the pelvis is not healthy. In addition, to observe the direction of the feet, if there is a significant difference in the direction of the feet, it means that the pelvis has rotational displacement, also indicates that the pelvis is not healthy, and there may even be back pain. Second, physical examination: go through physical examination to do pelvic separation test and squeeze test to determine whether there is pelvic injury. If the test is negative, the pelvis is healthy. If the test is positive, it means that the pelvis has an injury site and should be treated promptly.