After pregnancy, the phenomenon of lumbago and back pain in pregnant women is a normal manifestation. Mainly in the middle and late stages of pregnancy, the fetus grows faster, the uterus also enlarged, then the belly will appear bulging phenomenon, the center of gravity will be transferred to the lumbar vertebrae part, which will easily affect the blood circulation, so the symptoms of lumbago, back pain. If these phenomena occur in the first trimester of pregnancy, it is related to the endocrine. Because of the hormonal changes in the body after pregnancy, resulting in an increase in estrogen and progesterone, lumbar pain, back pain, body aches, weakness, fatigue, or drowsiness will occur. When this situation occurs, you should try to pay attention to bed rest, do not overwork, you can also moderate the use of massage to relieve the symptoms.