Diabetes mellitus diagnosis common diagnostic indicators include random blood glucose, fasting blood glucose, oral glucose tolerance test, etc. Fasting blood glucose ≥ 7.0 mmol/L, random blood glucose ≥ 11.1 mmol/L can be considered the possibility of diabetes mellitus. Diagnostic criteria for diabetes mellitus: diabetes mellitus can be diagnosed by fasting blood glucose ≥7.0 mmol/L, or 2-hour post glycemic load blood glucose ≥11.1 mmol/L, or random blood glucose ≥11.1 mmol/L, accompanied by three more and one less symptom (drinking more, eating more, urinating more, and weight loss). If there are no symptoms of diabetes, a diagnosis of diabetes is also considered if fasting blood glucose ≥7.0 mmol/L or two-hour postprandial blood glucose ≥11.1 mmol/L is monitored twice on non-same day. Prompt medical attention is recommended when abnormal blood glucose levels occur.