Nine months pregnant small stomach pain, usually may be physiological abdominal pain, miscarriage with aura, gastrointestinal disorders, acute appendicitis, etc., the specific analysis is as follows: 1, physiological abdominal pain: the fetus and uterus enlargement, upward and forward pressure on the gastrointestinal tract and the bladder, caused by gastrointestinal and bladder dysfunction, causing discomfort and pain. Physiological abdominal pain, do not worry too much, pay attention to observe the changes in the condition, if the abdominal pain is severe, long duration of the disease, need to pay attention to; 2, preeclampsia: if the pregnant woman is accompanied by vaginal bleeding, do not rule out the possibility of preeclampsia; 3, gastrointestinal disorders: pregnant women ate spicy and stimulating food and cold food, caused by gastrointestinal tract disorders, resulting in intestinal spasm, enteritis, need to be treated symptomatically; 4, acute appendicitis : If the pain in the right lower abdomen is more serious, accompanied by fever, nausea and vomiting, the possibility of acute appendicitis cannot be ruled out, and timely medical treatment and diagnosis should be made to avoid unnecessary complications.