Glucose tolerance generally refers to oral glucose tolerance test, usually the tester can not continue the test after one hour vomiting to avoid abnormal results. Oral glucose tolerance test is mainly used to check for diabetes, and the test taker needs to take venous blood to test fasting blood glucose and insulin in the early morning under fasting condition, and then take venous blood to measure the blood glucose and insulin level 30 minutes, 60 minutes, 120 minutes and 180 minutes after taking 75g of glucose orally. Glucose will be excreted if the patient vomits one hour after administration. To ensure the accuracy of the oral glucose tolerance test results, the test cannot be continued if the patient vomits one hour after taking oral glucose. Normally, blood glucose levels peak 30 to 60 minutes after a person has taken glucose by mouth, and then gradually decrease over time, with insulin dropping to basal levels after 3 hours. It is recommended that those who vomit one hour after the oral glucose tolerance test should seek medical attention the next day to determine if they have the disease. Be careful to fast for 8 to 10 hours before the test so as not to affect the results.