Glucose tolerance generally refers to oral glucose tolerance test, oral glucose tolerance test after drinking sugar water can generally be normal activities, not recommended strenuous exercise, so as not to affect the test results, it is recommended that the oral glucose tolerance test under the guidance of a doctor. Oral glucose tolerance test starts at 7~9 a.m., after fasting (8~10 hours), the subject orally takes 75g of anhydrous glucose powder dissolved in 300ml of water, and the sugar water is finished within 5 minutes. Blood was collected from the forearm before and 2 hours after taking the sugar to measure blood glucose. During the test, subjects should not drink tea and coffee, do not smoke, and are not recommended to do strenuous exercise, but do not need to be absolutely bedridden. Blood specimens should be sent for testing as early as possible. Those who have abnormal results after the oral glucose tolerance test are advised to go to the hospital for consultation.