Vague pain in the small of the stomach at 37 weeks of pregnancy may be caused by exertion, or may be seen in preterm labor or uterine ligament pulling. If the above causes are excluded, it may be caused by digestive system diseases, placental abruption, scarred uterus, ovarian cyst torsion, etc. I. Physiological conditions: 1. Exertion: When a pregnant woman is overworked, it can cause symptoms of vague pain in the small stomach. It is recommended to rest in bed and observe whether the abdominal pain symptoms have improved; 2, uterine ligament pull: 37 weeks of pregnancy has entered the late pregnancy, when the uterus increases more obviously, when the uterus increases, it is easy to pull the ligament, resulting in vague pain in the small belly, you can rest more, appropriate hot compresses; 3, pre-labour: if 37 weeks of pregnancy vague pain in the small belly, it may be pre-labour, the abdominal pain at this time is the contractions, generally The frequency is inconsistent, the duration is short, the interval is long and irregular. At the same time, the pregnant woman feels comfortable in her upper abdomen and has the feeling of fetal descent, in addition, she may see red, which is a reliable sign that labor is about to start. The pregnant woman needs to be admitted to hospital in time for delivery and be psychologically prepared to welcome the newborn. Second, the pathological situation: 1, digestive system diseases: if pregnant women combined with digestive system diseases, such as gastroenteritis, appendicitis, liver and gallbladder diseases, etc., may also appear at 37 weeks of pregnancy with different degrees of small stomach vague pain. If there is obvious discomfort, it is recommended to actively seek medical advice to clarify the cause, give appropriate medication and, if necessary, terminate the pregnancy to ensure the safety of mother and child; 2. Placental abruption: for pregnant women with hyperemesis and chronic nephritis combined with pregnancy, placental abruption is likely to occur, resulting in vague pain in the belly. At this time, the pregnant woman is in critical condition and needs anti-shock treatment, and at the same time, the pregnancy should be terminated immediately and a vaginal delivery or cesarean section should be chosen under the guidance of a doctor; 3, scarred uterus: some pregnant women with scarred uterus may experience scar rupture with the gradual expansion of the uterus before delivery, resulting in vague pain in the small stomach. In this case, the patient should go to the hospital immediately and undergo surgery as soon as possible.