High postprandial blood glucose and normal fasting blood glucose may be caused by improper diet, or it may be caused by abnormal glucose tolerance or diabetes.
1. Improper diet: If the patient’s pancreatic function is normal, but he/she eats too much sugary or starchy food at one time, such as noodles, rice porridge, cake, cookies, etc., he/she may have normal fasting blood glucose but elevated postprandial blood glucose.
2. Abnormal glucose tolerance: patients with fasting blood glucose of 3.9~6.1mmol/L and 2-hour postprandial blood glucose of 7.8~11.1mmol/L, suggesting that there is an abnormality in the body’s ability to regulate the concentration of blood glucose, and it can be considered that the patient has abnormal glucose tolerance.
3. Diabetes mellitus: If the patient’s fasting blood glucose is 3.9~6.1mmol/L, and the 2-hour postprandial blood glucose is ≥11.1mmol/L, and if there are typical symptoms of diabetes mellitus at the same time, or the 2-hour postprandial blood glucose is ≥11.1mmol/L on a non-same-day day, it can be considered that the patient is suffering from diabetes mellitus.
If the patient’s blood sugar is abnormal, it is recommended to go to the regular hospital in time for treatment, and then carry out appropriate treatment after a clear diagnosis.