Low back pain may occur in early pregnancy, which is one of the early pregnancy reactions. Low back pain during pregnancy is mainly due to the laxity of joint ligaments caused by elevated hormone levels, and the center of gravity of the pregnant woman shifts backward due to the enlargement of the uterus in the later stages, thus resulting in lumbar muscle strain and compression symptoms caused by misalignment of the joints. This can be relieved through massage, bed rest and other methods to relieve back pain. In addition, pre-miscarriage may also cause lower back pain, but the main symptom is abdominal pain, may be accompanied by vaginal bleeding, at this time to bed rest and treatment of tranquilizing the fetus. After excluding the back pain caused by pregnancy factors, we should consider the back pain caused by lumbar or sacral spine pathology, and should go to the hospital to clarify the cause of the disease. Therefore, if you have lower back pain during pregnancy, you should rest in bed and pay attention to it.