There is no fastest way to relieve back pain in pregnant women. Physiological causes can be relieved by proper rest, massage, etc. Pathological causes can be bed rest, medication, and surgery if necessary. 1. Physiological reasons: after pregnancy due to the influence of hormone levels can make pregnant women joint ligament relaxation, at the same time the increasing uterine protrusion will make the body center of gravity backward, lumbar vertebrae protrudes forward to make the back extensor muscles continue to be in a state of tension, and the emergence of lumbar soreness and back pain, it is a normal physiological phenomenon. (1) appropriate rest: pregnant women should avoid standing for a long time, can choose semi-recumbent position or side position and other comfortable position, and in the lumbar cushion on the backrest, etc. can be appropriate to relieve the symptoms. (2) Appropriate massage: under the guidance of a doctor, massage the lumbar and lumbosacral area with appropriate strength, which can also relieve the symptoms. (3) Calcium supplements: under the guidance of a doctor, calcium supplements can enhance bone quality and improve symptoms. 2. Pathological causes: such as lumbar disc herniation, etc., will aggravate the symptoms to different degrees after pregnancy due to the increase of lumbar spine weight-bearing. (1) Bed rest: Follow the doctor’s instructions for proper bed rest, and the bed should be soft and hard, and reduce activities, especially standing for a long time, which can relieve the symptoms appropriately. (2) medication: ibuprofen and other painkillers can be given under the guidance of the doctor to treat the symptoms. (3) Localized hot compresses: localized hot compresses can be given under the guidance of the doctor, which can also relieve the symptoms appropriately. (4) Surgical treatment: For severe symptoms, surgical treatment can be prescribed after delivery. When the symptoms of back pain persist, pregnant women need to go to the hospital to find out the cause and actively deal with it.