When is it appropriate to monitor blood glucose: Many old diabetics know that they should monitor fasting or blood glucose two hours before or after meals. Specifically: 1. Fasting blood glucose: refers to the blood glucose value measured by blood collected before breakfast after fasting for more than 8 hours overnight. The blood glucose measured before lunch and dinner cannot be called fasting blood glucose. 2.Pre-meal blood glucose: refers to the blood glucose measured before breakfast, lunch and dinner. 3. Two-hour postprandial blood glucose: the blood glucose measured two hours after breakfast, lunch and dinner. 4.Random blood glucose: blood glucose measured at any time of the day, such as before bedtime, midnight, etc. Notes on blood glucose monitoring: 1. Insufficient blood volume, blood glucose test paper beyond the expiration date, finger disinfection alcohol not yet dry, and not adjusting the code of blood glucose meter to the same as the test paper will affect the accuracy of detection. 2.After disinfecting the finger, make sure to wait for the alcohol to evaporate and dry before taking blood. 3, blood collection sites should be alternately rotated, and do not pierce a place for a long time to avoid the formation of scars. Blood collection on the side of the finger is less painful, and the blood volume is sufficient. 4.Properly store the used alcohol swabs, needles, etc., and preferably send them to the community health station for disposal. 5.Glucose meter should be placed in a dry and clean place, do not let children and pets touch and play with it. 6.Glucose meters should have after-sales service, and the accuracy of glucose meters should be corrected regularly at the store where they are purchased or at the place designated by the manufacturer.