Just ate a bite of melon is not recommended to measure blood glucose, blood glucose measurement in this case, the measured value does not have much significance for the adjustment of glucose-lowering program, the specific how to monitor blood glucose, should be carried out under the guidance of clinicians. The general monitoring of blood glucose includes fasting blood glucose and 2-hour postprandial blood glucose. Fasting blood glucose is generally measured in the morning under the condition of fasting, 8-10 hours before the examination fasting. Postprandial blood glucose is generally defined as 2 hours postprandial blood glucose, which needs to be tested 2 hours after eating. Currently blood glucose tested just after taking a bite of melon is outside of the above time frame and is less of a guide to a glucose-lowering regimen. Measuring blood glucose according to the standard time can more accurately determine the status of blood glucose metabolism, and have a more accurate judgment of the need for treatment and the adjustment of drug regimen, blood glucose monitoring needs to be reasonably carried out under the guidance of clinicians and standardized treatment.