The causes of increased fasting blood glucose level have some relationship with diet, emotion, drugs or diseases, etc. It is possible that a variety of etiological factors combined to cause elevated fasting blood glucose, according to the specific causes of the need for symptomatic glucose-lowering treatment, in addition to attention to the life of a reasonable diet, appropriate exercise. 1. Dietary factors: dietary factors are mainly long-term intake of excessive sweets or high-calorie foods, which can lead to increased fasting blood glucose, it is recommended to adjust the dietary structure, adhere to the principle of regular and quantitative diet, the dietary calorie control within a reasonable range. 2. Emotional factors: Emotional factors can lead to an increase in blood glucose levels, anxiety or depression can lead to changes in insulin and hormone secretion to antagonize insulin, resulting in increased blood glucose levels, it is recommended to accept the stress of life, relaxation of emotions. 3. Drug factors: when oral dexamethasone, diuretics, statins, may lead to increased fasting blood glucose levels, it is recommended to assess the need to continue to use such drugs, and then use hypoglycemic drugs to treat if necessary. 4. Disease factors: when the patient suffers from hyperlipidemia, hyperuricemia, uremia, diabetes mellitus, etc., may lead to increased fasting blood glucose level, it is recommended to actively treat the primary disease. Clinically, when the fasting blood glucose level is found to be increased, the first thing to do is to find out the cause, determine whether the patient has diabetes or not, and consult the endocrinology department of regular hospitals.