It is very common for pregnant women to experience back pain after 37 weeks of pregnancy. Because in the late pregnancy due to the rapid development of the fetus, pregnant women are very easy to lack a variety of nutrients and minerals, especially calcium, vitamins and iron. Once deficient, it is easy to cause back pain and lumbago. When back pain is accompanied by leg cramps and sciatica, in addition to quickly replenish calcium and vitamin B12, it is also necessary to consult a doctor in time to seek help. Lack of minor people, it is recommended to dietary supplements. In the second trimester of pregnancy, with the further development of the fetus and the gradual entry of the fetus into the pelvis, it will also lead to the emergence of symptoms such as lumbago and back pain. Therefore, when severe backache or abdominal pain occurs in the second trimester, it may be a symptom of approaching labor. If the pain is unbearable, it is recommended to go to the hospital for examination and treatment.