After the birth of a baby back pain, the main reasons are excessive force during childbirth, reflex pain, changes in body anatomy, bad habits, pelvic congestion, epidural anesthesia, lumbar cold, lumbar spine strain, etc., should be clear reasons for treatment: 1, excessive force during childbirth: during childbirth, if pregnant women exert too much force, they will use force muscles such as the muscles of the lower back strain, and produce too much acidic metabolites and thus cause back pain. At this time, through massage, hot compresses, etc., you can relieve the symptoms of low back pain; 2, reflex pain: some pregnant women will have low back pain after giving birth to a baby, which may be a reflex pain, related to the recovery of uterine contractions after delivery. Usually no intervention is needed and the symptoms of low back pain will be relieved by itself; 3. Changes in body anatomy: the uterus will become bigger when pregnant, thus squeezing the spine and causing biomechanical changes in body structure, and after the birth, this change has not been adjusted in time to recover, so the symptoms of low back pain may occur. Daily through the appropriate amount of lumbar exercise, you can gradually lumbago symptoms will be relieved; 4, bad habits: some pregnant women in the postpartum period, if there is a long time lying in bed, less activity and other bad habits, coupled with the bed is too soft, etc., will lead to chronic strain injury of the lumbar muscle caused by lumbago. At this time, the mother should pay attention to the combination of labor and rest, get out of bed early after delivery to promote blood circulation, and do not sleep on too soft beds, which can generally relieve the symptoms of lumbago; 5. pelvic congestion: during delivery, the fetus will be delivered through the birth canal will stimulate the pelvic organs, resulting in pelvic bleeding, which will lead to lumbago symptoms within a short time after delivery. Generally, after a few days of rest, the symptoms of lumbar pain will be relieved and disappear on their own; 6. Epidural anesthesia: when the mother uses caesarean section during delivery, epidural anesthesia may cause damage to the lumbar ligaments, thus causing postpartum lumbar pain. Acupuncture, physiotherapy, hot compresses, massage and other treatments can be carried out under the guidance of a doctor to promote the repair of lumbar ligaments and relieve the discomfort symptoms; 7, cold in the lumbar region: postpartum women’s body joint parts are loose, have not fully recovered, the body is weaker, easy to get cold, which leads to spasm of the lumbar muscles, ligaments and joint capsule, causing lumbar pain symptoms. Patients should strengthen warmth, especially the back, under the guidance of a doctor can take the appropriate amount of hot compresses, massage the waist and other ways to get rid of the cold in the body to relieve pain; 8, lumbar spine strain: during pregnancy as the fetus grows, the maternal abdominal pressure is increasingly large, will produce some damage to the lumbar spine, resulting in lumbar spine strain. You can go to a regular hospital for massage, massage and other treatments to relieve lumbar spine strain and pain symptoms; 9, other: for example, incorrect breastfeeding posture, pregnant women do not have sufficient rest after childbirth, can also lead to symptoms of lumbar pain, so postpartum women should pay attention to rest, avoid overwork, and avoid maintaining the same position for a long time during breastfeeding to avoid the emergence or aggravation of lumbar pain.