Diabetes is generally divided into 2 types, namely type 1 diabetes and type 2 diabetes, and a brief description of the diagnosis of type 2 diabetes. 1, first of all, type 2 diabetes is generally no obvious clinical symptoms, mostly found to be suffering from diabetes only during physical examination or after the occurrence of diabetic complications. There are many kinds of diabetic complications, and each person’s performance varies, such as manifestation of blurred vision in both eyes, peripheral neuritis, sweet smell in urine, protein in urine, eyelid edema, etc. 2, when the blood sugar is found to be higher than 6.1mmol/L and lower than 7.0mmol/L at the same time or higher than 7.0mmol/L during physical examination, please don’t be busy, after controlling diet and proper activities, then recheck fasting blood sugar for 2 times, fasting blood sugar is monitored by venous blood as the standard, the family-owned blood glucose meter cannot fully confirm the diagnosis. 3.After the fasting blood sugar is found to increase, further check the OGTT test, some are not higher than the normal range, only fasting blood sugar between 6.1mmol/L-7.0mmol/L, can not be controlled as blood sugar, the first stage of diabetes, at present, we must control the diet, strengthen the activities of physical exercise, pay attention to the review of blood sugar, if not pay attention to the further development of diabetes. 4, such as fasting blood glucose is normal, only OGTT is higher than the normal range, also and Article 3 belong to the first stage of diabetes, as long as pay attention to control diet, appropriate activities, can delay the development of diabetes. It is not necessary to take drugs. 5, such as eating more, drinking more, urinating more, progressive wasting, check the blood sugar fasting exceeds normal, the diagnosis of diabetes can be established; such as the presence of three more and one less symptoms, measuring any blood sugar higher than 11.1mmol / L, you can diagnose diabetes.