Fasting blood glucose 7.1mmol / L belongs to the elevation of blood glucose, may be diabetes, but the diagnosis of diabetes mellitus also need to be combined with clinical symptoms, 2 hours after meals blood glucose, review of fasting blood glucose, glucose tolerance test, etc. Comprehensive analysis in order to diagnose, only based on a single fasting blood glucose test can not be diagnosed diabetes mellitus. The latest diagnosis of diabetes mellitus is based on the typical symptoms of “three more and one less” (drinking more, urinating more, eating more, and weight loss) plus the measurement of venous plasma glucose ≥11.1mmol/L, fasting blood glucose ≥7.0mmol/L, or glucose ≥11.1mmol/L 2 hours after glucose tolerance test at any time of the day. Diabetes mellitus is diagnosed when one of these three criteria is met. Fasting blood glucose 7.1mmol/L is an abnormality, there is a possibility of diabetes, but it can not be ruled out that other factors lead to high blood glucose, such as infections, stress and so on. After testing fasting blood sugar 7.1mmol/L, you should be clearly diagnosed under the guidance of a physician.