Once the symptoms of stomach pain and lower back pain appear during pregnancy, pregnant women generally have fears of miscarriage, premature birth or abnormal fetal development. What’s wrong with stomach pain and back pain during pregnancy: a. Urinary system diseases: poor living habits and hygiene habits of pregnant women during pregnancy, drinking too little water, poor cleaning of the vulva area, resulting in retrograde infection of pathogenic microorganisms causing urethritis, cystitis, or suffering from urinary system stone disease, can cause symptoms of back pain and stomach pain. Second, pelvic inflammatory disease: pelvic inflammatory disease is also one of the most common causes of lumbago and stomach pain during pregnancy. It is usually accompanied by yellow or purulent discharge from the vagina and itching in the vagina. Premature miscarriage and preterm labor: the pain is more regular, intermittent, and gradually intensifies, accompanied by a distinct feeling of falling.