Decreased glucose tolerance is an early manifestation of diabetes. When hypoglycemia occurs, it is important to control the diet, actively participate in exercise, and take medication if necessary. Decreased glucose tolerance can occur in the early stages of diabetes. It is important to pay attention to it and take active intervention to prevent or delay the progression to diabetes mellitus. When hypoglycemia occurs, it is necessary to control the diet, do not eat too much staple food every day, you can eat more vegetables and fruits and other foods rich in dietary fiber, such as broccoli, radish and so on. At the same time also adhere to exercise, it is best to adhere to aerobic exercise for more than one hour a day. Exercise can enhance physical fitness, which can not only prevent the occurrence and development of diabetes, but also prevent other diseases. Patients who are still unable to control their blood sugar after life conditioning can lower their blood sugar by taking hypoglycemic drugs, such as metformin, under the guidance of a doctor. When there is a decrease in glucose tolerance, it is recommended to consult a doctor in time, after a comprehensive and systematic examination, under the guidance of the doctor, actively adjust the lifestyle, and use hypoglycemic drugs if necessary.