There are many reasons why the body is not fat on the stomach, may be abdominal obesity, may be cirrhosis ascites. 1. Abdominal obesity: refers to the fat accumulation in the abdomen as a characteristic, because of its visceral fat increase, waist thickening, so it is “pear-shaped” obesity, that is, the limbs are not fat, but the stomach is big. This kind of obesity is related to the patient’s diet structure, should pay attention to reduce meat intake, increase the proportion of vegetables and fruit intake. 2. Cirrhosis ascites: Cirrhosis patients with decompensated stage, refers to the cirrhosis patients due to liver function damage and portal hypertension caused by the accumulation of fluid in the abdominal cavity, the formation of ascites. Because of liver disease, poor digestive function and malnutrition, the patient’s limbs are not fat, but the stomach is large because of fluid accumulation in the abdominal cavity. Unexplained abdominal distension and increased size may also be caused by other reasons such as ascites and abdominal tumors. The patient should consult the doctor in time to clarify the specific cause of the disease and follow the doctor’s instructions for treatment.