The child into the pelvis back pain, generally considered with excessive anterior pelvic tilt, contraction, lumbar spine disease and other factors, if necessary, can be timely to the hospital. 1. Excessive anterior pelvic tilt: in late pregnancy, the child enters the pelvis until normal delivery, the burden on the abdomen is heavier, the pregnant woman’s pelvis is tilted forward, and in the long run, the pregnant woman’s lumbar spine is uncomfortable, and the phenomenon of back pain occurs. 2. Contractions: After the child enters the pelvis in late pregnancy, it may stimulate the uterus, and intermittent pseudo-contractions will occur, and the lumbar muscles will be stimulated by the contractions, which will cause lumbar pain and back pain. 3. Lumbar spine disease: pregnant women who suffer from lumbar disc herniation, lumbar muscle strain and other diseases may be aggravated in the late pregnancy, the performance of back pain. If there is a child into the basin of the phenomenon of back pain, should pay attention to rest, can be on the back of the waist and back massage, hot compresses and other ways, can promote blood circulation, relieve discomfort. If the above methods are not relieved, you need to go to the hospital in time.