Hip pain after childbirth is not actually caused by the hip bone, but by the separation of the pubic symphysis. During childbirth, due to the size of the child, the woman’s pubic symphysis separates, making it easier for the child to be delivered. After the birth of a child, it takes time for the pubic symphysis to recover, which takes about a month or even more than six months, during which the woman may have back pain, abnormal menstruation and pain in the pubic bone, which is the symptom described by the patient. Generally no special treatment is needed, as long as the symptoms will be relieved by lying down and resting, patients can also choose to use a girdle to promote the recovery of the pubic symphysis after the monthly period.