Small stomach pain in more than 4 months of pregnancy can be categorized into physiological factors and pathological factors according to the causes. Physiological factors include uterine enlargement caused by the pulling and pressure pain, pathological factors include preeclampsia, gynecological inflammation, acute gastroenteritis, etc., need to be based on the signs of the pregnant woman and the results of the examination of a comprehensive judgment, choose the best treatment measures. First, physiological factors uterine enlargement: 4 months pregnant, due to the growing fetus, the uterus increases in size, the uterus pulling, compression of the surrounding tissues, there is a slight tingling, swelling pain, etc., with the change of position can generally be relieved, pregnant women do not have to worry, more bed rest, pay attention to warmth can be. Second, pathological factors, 1, preeclampsia: pregnant women with small stomach pain and accompanied by a small amount of vaginal bleeding, may be a preeclampsia, should follow the doctor’s instructions to use progesterone to protect the fetus treatment, to avoid sex during treatment; 2, gynecological inflammation: pelvic inflammation, adnexitis and other inflammatory reactions, pregnant women will have small stomach pain symptoms, can be accompanied by vaginal secretion abnormalities, need to comply with the doctor’s instructions for the use of antibiotic treatment, drink plenty of water and maintain a Light diet, inflammation disappears after the abdominal pain can be relieved; 3, acute gastroenteritis: pregnant women with stomach pain and accompanied by nausea, vomiting, diarrhea, belching, etc., may suggest that the digestive tract function abnormalities, common acute gastroenteritis, you need to consult a doctor for a clear diagnosis, line targeted treatment.