The most common causes of lumbago in pregnant women are as follows: 1, the demand for calcium in pregnant women has increased a lot, including the demand for nutrients, if pregnant women do not pay attention to calcium supplementation, the fetus will take in more calcium from the body, and the lack of calcium will produce soreness in the lumbar back. 2, as the gestational age increases, the gestational sac increases, the uterus increases, the force in front of the lumbar spine is greater, and the stretching effect on the muscles in the back is stronger, which may also The enlarged uterus will cause pressure and impact on the sympathetic nerves and blood vessels in the lumbosacral area, especially when lying in the supine position, there may be pressure on blood vessels and nerves, including stasis of blood vessels in the pelvic floor and presacral area, which will cause pain in the lumbar area due to the decrease in nerve function. It is mainly through nutrient supplementation, proper rehabilitation and exercise, doing functional exercises for the lumbar and back muscles, moderate aerobic exercise, brisk walking and strolling, including through physiotherapy and massage, etc., which can effectively relieve. If self-treatment cannot be relieved, hospital consultation is recommended, except for those caused by other diseases.