Two-hour postprandial blood glucose is usually timed from the time the first bite of the meal is consumed. Two-hour postprandial blood glucose is an important way to diagnose and detect diabetes in diabetic patients, and is usually timed from the time the first bite of the meal is eaten. In general, the 2-hour postprandial blood glucose value is <7.8mmol/L in healthy people, and the 2-hour postprandial blood glucose value in diabetic patients is ≥11.1mmol/L. If the 2-hour postprandial blood glucose value is abnormal, diabetes can't be diagnosed, and it should be combined with the related clinical symptoms and other indicators such as fasting blood glucose to make a comprehensive judgment. Diabetes mellitus can be diagnosed if the patient has symptoms such as polydipsia, polyphagia, polyuria, weight loss, fasting blood glucose ≥7.0 mmol/L and abnormal 2-hour postprandial blood glucose values. The patient should go to the hospital in time, and after the diagnosis is clarified, follow the doctor's instructions to treat the disease through diet, exercise, hypoglycemic drugs (e.g., metformin), insulin and other ways. It is recommended that patients with abnormal 2-hour postprandial blood glucose values go to the hospital in time to avoid delays.