Glucose tolerance refers to oral glucose tolerance test, if diabetic patients, monthly fingertip blood glucose measurement, do not need to do oral glucose tolerance test; if the diagnosis of diabetes mellitus is suspected of normal people need to do. 1. Diabetic patients: For patients who have been diagnosed with diabetes and follow the medical advice to regulate oral hypoglycemic drugs, such as metformin, glimepiride, etc., and inject insulin therapy, daily monitoring of blood glucose through capillary blood glucose measurement (i.e., fingertip blood) is sufficient. 2. Normal people with suspected diabetes: If the patient is not diagnosed with diabetes, it is suspected diabetes, which can not be clearly diagnosed only by fingertip blood glucose, but also needs to be combined with glucose tolerance test and related clinical symptoms. Oral glucose tolerance test needs to be conducted under the guidance of a doctor, if there is discomfort during the monitoring period, consult a specialist in time.