The small belly bulges like pregnancy, the common reasons are as follows: First, complete intestinal obstruction, mostly seen in elderly patients, due to the obvious weakening of intestinal peristaltic function, which can cause a large amount of fecal and intestinal fluid accumulation in the intestinal canal, causing significant expansion of the intestinal canal, manifested as a small abdominal bulge. The nature of the lesion can be clarified by completing CT examination of the abdomen, and oral administration of drugs such as lactulose, Benadryl tea or pantethine glucosamine can promote the excretion of intestinal contents. After the intestinal excretion is complete, the symptoms of abdominal bulging can be completely relieved. Giant ovarian tumors, mostly seen in middle-aged women, can cause bulging changes in the small abdomen or the whole abdomen. As the giant tumor compresses the intestinal canal in the abdominal cavity, it will cause difficulty in eating and obstruction in defecation, which needs to be removed surgically. After complete removal of the tumor, normal eating and defecation can be restored.