Frequent back pain at 37 weeks of pregnancy is a physiological manifestation because it has entered the second trimester of pregnancy and the fetus entering the pelvis will compress the pelvic cavity, resulting in poor blood circulation around it, which will cause insufficient blood supply and lead to the phenomenon of back pain and lumbago. Especially when the fetus grows, the uterus enlarges and the abdominal cavity bulges forward, which increases the load on the lumbar vertebrae and causes lumbago and back pain. During this period you should try to pay attention to rest, pay attention not to sit or stand for a long time, you should try to take a rest in the left side lying position, which is conducive to blood circulation, ring relief symptoms. Pregnant women in the middle and late stages of calcium deficiency will lead to osteoporosis, which will also cause lumbago, lumbago, and also need timely calcium supplementation to relieve the symptoms.