Whether 2-hour postprandial blood glucose 8.3 mmol/L is serious or not needs to be judged on a case-by-case basis. If it is abnormal glucose tolerance, the situation is not particularly serious compared to diabetes, but it needs to be taken seriously; if it is diabetes, the situation is relatively serious. Normal 2-hour postprandial blood glucose should be <7.8mmol/L, 2-hour postprandial blood glucose 8.3mmol/L has exceeded the normal blood glucose value, belongs to the abnormal glucose tolerance, the situation is relatively not serious, but need to pay enough attention to avoid the development of diabetes, such cases can be controlled through diet and exercise to control blood glucose. The 2-hour postprandial blood glucose is 8.3mmol/L, it is recommended to improve the fasting blood glucose and glucose tolerance test, if the fasting blood glucose is more than 7mmol/L, accompanied by the typical symptoms of diabetes, it is necessary to consider the occurrence of diabetes, the situation is relatively serious, and it is recommended to comply with the doctor's instructions for treatment, in order to avoid the occurrence of diabetic complications. In addition, it is recommended that when the 2-hour postprandial blood glucose is 8.3mmol/L, go to the hospital in time and follow the doctor's instructions for treatment, so as to avoid delaying the condition.