If the 3-hour glucose tolerance test is a little bit high, you need to consider treatment through lifestyle intervention to lower blood glucose; if you are diagnosed with diabetes mellitus, you need to consider treatment with medication. The third hour blood glucose after glucose tolerance test should be close to the level of fasting blood glucose, if there is a mildly high blood glucose value at this time, consider that it is caused by pre-diabetes, at this time you need to control the diet, such as controlling the total calorie intake, avoiding high sugar, high fat food, etc. as well as with the exercise exercise, to promote the blood glucose return to the normal level. If it is caused by diabetes mellitus, you need to follow the doctor’s advice to use metformin, acarbose and other hypoglycemic drugs or insulin injection treatment. In case of elevated blood glucose in the third hour after the glucose tolerance test, it is recommended to go to the hospital and ask the doctor to make a judgment based on your own situation and give you a treatment plan.