Low back pain in early pregnancy is often caused by changes in hormone levels in the body, the forward shift of the body’s center of gravity leading to excessive stretching of the lumbar muscles, etc. It may also be combined with other diseases, such as lumbar disc herniation, pelvic inflammatory disease, etc. I. Common causes: 1. Change in hormone level: In early pregnancy, the body of pregnant women will secrete a large amount of estrogen and progesterone, which leads to the relaxation of the pelvic ligaments, leaving the pelvis in a relaxed state and more adapted to the growth and development of the fetus, which in turn leads to a decrease in the stability of the pelvis and spine, producing symptoms of lumbago. In addition, the large secretion and increase of hormones can lead to pelvic congestion, thus causing soreness and pain in the lumbar region; 2. Forward shift of body weight: after pregnancy, the pregnant woman’s body state changes and her weight increases, which leads to a forward shift of body weight and strain on the muscles of the lumbar back, thus causing lumbago; 3. Lumbar disc herniation: if the pregnant woman herself suffers from lumbar disc herniation, it can manifest as persistent dull pain in the lumbar back, which If the pregnant woman suffers from pelvic inflammatory disease, it can be manifested as lower abdominal pain, increased vaginal discharge, fever, irregular vaginal bleeding, lumbosacral pain, etc. Treatment: 1, general treatment: pregnant women should pay attention to rest, do not sit and stand for a long time, avoid strain, avoid lifting heavy objects, can take bed rest, physical therapy and other methods, can also be appropriate massage to relieve pain, but should pay attention to the action should be gentle; 2, drug treatment: if only mild pelvic inflammatory disease, can be considered for observation. However, if there is a combination of fever, abdominal pain, nausea, vomiting and other serious pelvic inflammatory disease, check the blood picture is higher than normal, consider the case of heavy inflammation, you can choose the fetus less affected penicillin and cephalosporin drugs for treatment, should pay attention to avoid any private use of oral drugs or topical drugs, so as not to affect the development of the fetus.