Fasting blood glucose 7.1 ~ 7.8mmol / L, if at the same time appeared to drink more, eat more, urinate more, weight loss of the typical symptoms of diabetes, by the regular hospital diagnosis and treatment can be diagnosed as diabetes. Clinical testing of fasting blood glucose, 3.9 ~ 6.0mmol / L is normal, 6.1 ~ 6.9mmol / L for impaired fasting glucose regulation, ≥ 7.0mmol / L at the same time diabetic symptoms can be diagnosed as diabetes. Typical diabetic symptoms include excessive drinking, excessive eating, excessive urination, weight loss, and can also show non-specific symptoms such as fatigue, drowsiness, and wounds that do not heal easily. Therefore, when the fasting blood glucose is 7.1-7.8mmol/L, it is likely to be diabetes mellitus, and you should seek medical treatment in time, combined with clinical symptoms to clarify the diagnosis. At the same time, complete the OGTT, glycated hemoglobin and other related tests to comprehensively assess the condition. Fasting blood glucose 7.1～7.8mmol/L is recommended to consult a doctor in time.