It is relatively normal to have back pain in early pregnancy. It is caused by calcium deficiency. As the baby grows and develops, it needs more and more calcium substances. The mother must consume a large amount of calcium-containing substances to meet the needs of the growing baby. If calcium intake is not sufficient, symptoms such as back pain and lumbago may occur. It may also be affected by other factors that cause fetal movement, which may lead to miscarriage. If it is due to too strenuous exercise, it can lead to the phenomenon of miscarriage. It is recommended to pay attention to the fact that if it is caused by calcium deficiency, it must be supplemented with calcium substances in a timely manner by eating more calcium-rich foods and, if necessary, by taking calcium tablets. If there is a possibility of miscarriage, it is recommended to go to the hospital for timely examination and treatment to try to avoid miscarriage.