There are two ways of glucose tolerance test, one is drinking sugar water and the other is steamed bun meal. Sugar water is usually 75g of glucose and buns are 100g. You should eat a light diet the night before you do the glucose tolerance. You should fast before doing the test, and if you drink glucose, you need to mix 75g of glucose and 200~300ml of water. Measure fasting blood glucose once before drinking glucose water, then drink the glucose water within 5min, and measure blood glucose at the 30th minute, 1sth, 2ndh and 3rdh after drinking glucose water respectively. If you use steamed bun meal to measure glucose tolerance, fasting before the test, carry 100g ordinary steamed bun, first measure fasting blood glucose, then eat steamed bun, respectively, 30th minute after eating the first bite of steamed bun, 1sth, 2ndh, 3rdh when measuring blood glucose. When the glucose tolerance test is abnormal, please go to the regular hospital, with the help of the doctor to clarify the cause of the disease, and targeted treatment.