Fasting blood glucose 7.3mmol/L is higher than the normal fasting blood glucose level, has reached the diabetes mellitus fasting blood glucose standard, should also be combined with the 2-hour postprandial blood glucose, glycated hemoglobin and other comprehensive assessment of the condition. Fasting blood glucose refers to the fasting overnight, the next morning before the meal blood glucose concentration, is an important diagnostic indicator of glucose metabolism disorders. The normal value of fasting blood glucose is 3.9-6.1mmol/L, greater than or equal to 7mmol/L, should be considered as possible diabetes. Fasting plasma glucose 7.3mmol / L, such as dry mouth, drinking and other symptoms, can be diagnosed with diabetes mellitus; such as no dry mouth, drinking and other symptoms, should be every other day to test plasma glucose again, or improve the oral glucose tolerance test, glycated hemoglobin, to clarify whether there is diabetes mellitus. Long-term elevated blood glucose can lead to microangiopathy, retinopathy, diabetic nephropathy, etc. It can also lead to atherosclerotic cardiovascular disease, neuropathy, diabetic foot and so on. When fasting blood glucose 7.3mmol / L, should consult the hospital in a timely manner, under the guidance of specialists to improve the next step in the examination to assess the condition, and to give professional diagnosis and treatment, do not blindly use medication and so on.