The main reasons for the sudden increase in the size of the diabetic stomach can be seen in the following points: First, abdominal obesity, diabetes, especially type 2 diabetes, is mostly seen in obese patients, but this kind of stomach gets bigger with a certain process, just suddenly found, as a result of weight gain. Second, gastrointestinal distention, diabetic patients with gastrointestinal tract plant neuropathy, can appear gastrointestinal distention resulting in a larger stomach. Three, ascites, diabetic patients combined with cirrhosis, various causes of heart failure or combined with diabetic nephropathy, hypoproteinemia may lead to ascites. Four, abdominal tumors, diabetes patients with abdominal tumors may also lead to a sudden increase in the size of the stomach in a short period of time. Fifth, diabetic vegetative bladder, is a diabetic vegetative neuropathy leading to abnormalities in the contractile tone of the innervated bladder, urinary storage abdominal enlargement. Therefore, if a diabetic patient has a sudden enlargement of the stomach, he should go to the hospital in time to clarify the cause.