The possible reasons for diabetic patients’ stomach getting bigger and bigger include obesity, gastrointestinal flatulence, ascites, tumors and so on, and it is recommended to seek medical treatment in time. 1. Obesity. Some patients with type 2 diabetes mellitus may have abdominal obesity in the early stage, the accumulation of fat in the abdomen, the stomach is getting bigger and bigger. 2. Gastrointestinal flatulence. Diabetic patients after a long time because of unstable blood sugar control may appear microvascular lesions and autonomic neuropathy, gastrointestinal autonomic neuropathy can make the gastrointestinal tract peristalsis is poor, and intestinal flatulence, resulting in the stomach looks bigger. 3. Ascites. Diabetic patients with poor glycemic control over a long period of time may be complicated by many concurrent diseases, such as cirrhosis of the liver, diabetic nephropathy, etc., which can trigger ascites, resulting in a larger stomach. If diabetic patients find the above symptoms, they should go to the hospital in time to find the cause of the disease and be treated under the guidance of the doctor.