Many people go to the hospital and get a lab slip to see high blood sugar and think they have diabetes, in fact, this is a misconception, high blood sugar ≠ diabetes!!!! Let’s count the difference between diabetes and hyperglycemia together. Diabetes is a common endocrine metabolic disease with high blood sugar as a common feature, which is caused by absolute or relative deficiency of insulin. Diabetes mellitus appears to be elevated blood glucose, but in reality, the islet function is damaged, while elevated blood glucose due to short-term factors, where the islet function is not damaged, cannot be diagnosed as diabetes mellitus. A single increase in blood glucose cannot make a complete judgment, and the diagnosis of diabetes can be clarified only when the blood glucose is rechecked several times. Therefore, elevated blood sugar does not necessarily mean that you have diabetes, but diabetes must be accompanied by symptoms of high blood sugar. Diabetes is caused by the disorder of the human endocrine system, resulting in the dysfunction of sugar metabolism. Hyperglycemia is the high level of sugar in the body’s blood, and diabetes can lead to high blood sugar. Diagnostic criteria of diabetes and hyperglycemia: Hyperglycemia: If blood sugar exceeds 6.1mmol/L and does not reach 7.0mmol/L, it should be called impaired fasting blood sugar; hyperglycemia exceeds 7.8mmol/L 2 hours after meal but does not reach 11.1mmol/L, it should be impaired glucose tolerance. Diabetes: blood sugar has reached 7.0mmol/L fasting and 11.1mmol/L 2 hours after meal, which can be diagnosed as diabetes. In addition, some patients whose blood glucose is found to be above normal during physical examination should actively undergo a glucose tolerance test of 75g to confirm the presence of diabetes. So what circumstances can cause blood glucose to rise even if you are not diabetic? 1, certain drugs can also cause high blood sugar, such as commonly used glucocorticoids and thiazide diuretics. Endocrine diseases, such as hyperthyroidism, acromegaly and Cushing’s syndrome can cause high blood sugar. 3. Surgery can also cause high blood sugar, such as serious damage to the pancreas, pancreatitis, pancreatic surgery and pancreatic tumor can cause high blood sugar, and gastrojejunostomy can also cause temporary high blood sugar. High blood sugar is also related to genetic factors and environmental factors. Therefore, as long as we have a regular and light diet, less smoking and drinking, and reasonable exercise, we can regulate high blood sugar. Although hyperglycemia is not necessarily a manifestation of disease, it should not be underestimated. Once hyperglycemia is found, we should go to the hospital for systematic treatment in time.