The pelvis usually refers to the pelvis. The causes of postpartum pelvic pain mainly include pelvic muscle and ligament injury, postpartum contraction pain and osteoporosis, etc. The causes should be clarified and treated. Common causes 1, pelvic muscle and ligament damage: when the whole body of the fetus is delivered from the vagina, it will exert certain pressure on the pelvis, muscles and ligaments of pregnant women, and the ligaments, muscles and bones in the pelvic structure will be inevitably damaged, thus causing postpartum pelvic pain; 2, postpartum contraction pain: after delivery, the uterus will gradually return to normal size through contraction, which will produce contraction pain, especially for multiparous mothers and menstruating mothers. More intense, so it is mistaken for postpartum pelvic pain; 3, osteoporosis: during pregnancy, the demand for calcium increases due to the development of the fetus, and if calcium is not supplemented in time, it will lead to osteoporosis in pregnant women and obvious pelvic pain after childbirth. Treatment method 1. Early activity on the ground after delivery can play a role in pelvic recovery and pain relief; 2. Pelvic exercises can be performed two weeks after delivery, which can help the pelvis and its muscles recover and relieve pelvic pain. The mother can put her hands on the ground, kneeling support, lift one of the feet, and then stretch backwards, feeling a sense of stretching from her hips to her ankles, alternating between the left and right feet 5 times; 3, follow the doctor’s advice for calcium supplementation to relieve the symptoms of osteoporosis. Attention maternity should pay attention to rest, avoid overexertion, light diet, and appropriate exercise after meals to promote postpartum recovery and relieve pain.