Post-meal sleepiness refers to being particularly sleepy after eating every day. No special examination items are generally required for this disorder, but blood tests, blood sugar tests, brain CT, brain MRI and other examination items can be performed to rule out some suspicious diseases for disease detection. Laboratory tests: blood glucose, liver function, kidney function, thyroid function and other laboratory tests are necessary to determine the cause of narcolepsy. Imaging tests: CT brain or MRI brain scan helps to diagnose and differentiate the type of narcolepsy. Special tests: Several other tests such as sleep physiology brain wave meter and multiple sleep latency tests are needed to confirm the diagnosis. Secondly, the examination items of sleepiness after meals caused by diabetes: glucose tolerance test, insulin, C-peptide release test: this examination is the most important one in the medical examination of diabetes. Glucose tolerance test is an internationally recognized diagnostic test for diabetes, which is to measure venous fasting blood glucose and glucose after glucose load, fasting blood glucose ≥7.0mmol/L, 2 hours after meal blood glucose ≥11.1mmol/L, can be diagnosed as diabetes. While doing the glucose tolerance test, blood can be collected to measure insulin and C-peptide to understand the maximum secretion capacity of pancreatic B-cells under glucose load, which can assist in judging the reserve function of pancreatic B-cells, and is especially meaningful for guiding the selection of treatment methods. Fasting blood glucose test: Fasting blood glucose test is one of the most important items in the routine examination of diabetes. Blood can be drawn in the hospital to detect venous blood glucose through biochemical analyzer, and more commonly, the test paper of home blood glucose monitor can detect finger blood glucose, both of which obtain the result through glucose oxidation enzyme method reaction and have certain specificity. 2 hours postprandial blood glucose test: 2 hours postprandial blood glucose measurement is also another important method to diagnose and monitor diabetes. Clinically, there are many patients who do not have high fasting blood glucose but have significantly higher blood glucose 2 hours after meal, which can also be diagnosed as diabetes mellitus. Routine physical examinations simply testing fasting blood glucose will miss almost 50% of diabetic patients. Urine glucose test: Until the advent of self-monitoring of blood glucose, the test of urine glucose has been the main method of daily assessment of diabetes control. Third, cardiovascular disease caused by postprandial sleepiness examination: cardiovascular aspects can do heart ultrasound, electrocardiogram, laboratory liver and kidney function, and to monitor blood pressure, blood lipids, blood sugar. In other aspects, ultrasound of liver, gallbladder, spleen and kidney, chest X-ray or CT should be done, especially when there are various stimulating factors (such as changes in emotion, changes in exercise), the body is often in a state of stress, and detailed examination should be done. The elderly often have different degrees of atherosclerosis, lipid and sugar metabolism disorders, increased blood viscosity, low red blood cell deformation capacity, which makes it easy for thrombosis to form, so it is important to monitor the period and make timely adjustments according to the situation.