Hip pain after giving birth to a child may be related to the following factors: 1, changes in hormone secretion in the body, pregnancy and the birth process to meet the needs of the baby’s growth and development, delivery, hormone secretion changes, uterine ligaments are relatively loose, excessive pulling, separation of the pubic symphysis, which will lead to the emergence of hip pain, along with the repair of the postpartum period, the symptoms of pain will be slowly alleviated. 2, the relative increase in body weight after pregnancy, the relative reduction of activity The long sitting position and semi-recumbent position lead to long time pressure on the sacrococcygeal area, chronic strain on the surrounding tissues, aseptic inflammatory reaction, causing sacrococcygeal arthritis, leading to sacrococcygeal pain, which can be relieved by localized hot compresses and massages.3. If the sacrococcygeal area is in severe pain that cannot be tolerated, consider whether there is ligament strain, and need to go to the hospital for medical treatment.