Dyspepsia does not usually cause high blood glucose, but it may cause low blood glucose. Dyspepsia often causes digestive symptoms, such as bloating, loss of appetite, etc., and has little to do with elevated blood glucose, which may be caused by pancreatic islet dysfunction. Patients who suffer from indigestion may experience a feeling of fullness after meals, accompanied by loss of appetite, nausea, and in severe cases, pain in the upper abdomen. Dyspepsia leads to less eating, which may lead to hypoglycemia, and usually does not cause high blood sugar. High blood glucose is due to pancreatic islet dysfunction. It is recommended to monitor fasting blood glucose and postprandial blood glucose, and seek medical attention if necessary to clarify whether diabetes is present. Patients with dyspepsia or high blood glucose are advised to seek prompt medical attention for examination and treatment under the guidance of a doctor.