A large abdomen may be related to physiological factors such as overeating and obesity, as well as pathological factors such as intestinal obstruction and uterine fibroids. 1. Physiological factors: excessive daily eating, reduced exercise, weight gain, and gradually become fat, fat increases and accumulates in the small abdomen, which may lead to a small abdomen. 2. Pathologic factors: (1) Intestinal obstruction: mainly caused by abdominal surgery, intestinal inflammation, intussusception, tumor, etc. It often shows abdominal pain, vomiting, abdominal distension, etc., which may lead to the appearance of a small abdomen. (2) Uterine fibroid: mainly caused by sex hormone abnormality, often showing abnormal menstruation, leucorrhea, lower abdominal discomfort, lower abdominal mass, etc., which may lead to abdominal enlargement. In case of abdominal enlargement, if accompanied by other uncomfortable symptoms, it is recommended to consult a doctor in time to find out the cause and then treat it.