What are the times when blood glucose is often tested in clinical practice? 1. Fasting blood glucose: Overnight fasting, blood is drawn between 6 and 8 am. 2.Pre-meal blood glucose: Blood is taken before lunch and dinner, mainly for monitoring the condition during treatment. 3.2 hours postprandial blood glucose: Timed from the time of eating, and blood is collected 2 hours later. 4.Random blood glucose: It is checked at any time of the day, when hypoglycemia or hyperglycemia is suspected. Factors affecting blood glucose testing: Diet, exercise, emotion, sleep and medication can all affect blood glucose testing. Hospitals usually open at eight o’clock in the morning, and on the day of blood glucose testing, patients may walk, ride a bike or take a car to the hospital. If the patient walks or bikes for a long time, the blood glucose value may be low; if the patient walks or bikes too fast in order to hurry, the blood glucose value may be higher; if the patient encounters traffic jams on the way, or encounters a large number of people in line after arriving at the hospital, the patient may become impatient, and the blood glucose value may also be higher.