“Blood glucose 19mmol/L two hours after drinking glucose water” generally means that the blood glucose measured two hours after taking 75g of glucose water orally in a glucose tolerance test is 19mmol/L, which is more than the normal range and may be more serious. Under normal circumstances, drinking 75g of glucose water 2 hours after blood glucose ≥ 11.1mmol / L, and there are typical “three more and one less” symptoms (drinking, urinating, eating, weight loss), can be diagnosed as diabetes mellitus. Therefore, a blood glucose of 19 mmol/L 2 hours after drinking sugar water may be more serious. Patients with blood sugar 19mmol/L 2 hours after drinking sugar water are advised to go to the hospital in time and follow the doctor’s instructions.