Measuring blood glucose immediately after a meal is usually elevated, and measuring blood glucose after a workout may raise or lower it. Generally, fasting blood glucose is 3.9-6.1 mmol/L, 1-hour postprandial blood glucose is 6.7-9.4 mmol/L, up to 11.1 mmol/L. 2-hour postprandial blood glucose is less than 7.8 mmol/L. Because meals take in a large amount of carbohydrates, proteins, fats, and other substances, they may cause postprandial blood glucose to rise. However, normal people with normal insulin secretion function, the body can regulate blood glucose fluctuations within the normal range. Blood glucose measurement after exercise may rise due to the exercise will make the body’s adrenaline and norepinephrine secretion increase, it may raise blood glucose, blood glucose measurement after exercise may be reduced due to the body’s need for sugar will increase after exercise, it may lead to the body’s blood glucose lower. If the blood glucose elevation persists without relief, you need to seek medical treatment in time.