Blood glucose self-monitoring is an indispensable part of diabetes treatment and must be mastered by every diabetic. The most important thing for blood glucose monitoring is to use the portable blood glucose meter correctly. At present, there are many brands of blood glucose meters sold in the market, but the working principle is similar, basically, they can meet the requirements of patients’ self-monitoring of blood glucose, and patients can choose according to their own preferences. After choosing a suitable blood glucose meter, you should learn the correct use method under the training of professionals, and understand the factors that may affect the test results and the storage method of test paper. Pay attention to check whether the test paper type matches the instrument, whether the test paper is expired or deteriorated before each test, and regularly calibrate the instrument to check the accuracy of the blood glucose meter. How often is it appropriate to monitor blood glucose? Patients using oral medication should measure fasting, 2 hours after meal and bedtime blood glucose for 3 consecutive days a week in the first two weeks after starting to adjust the dose, in order to understand the control of blood glucose in different time and determine the appropriate medication dose. After the blood glucose is stabilized, fasting, bedtime and 2 hours after meal blood glucose can be measured once a week. For patients using insulin, blood glucose should be measured at the peak time of insulin action. If you are using medium-acting insulin, you should measure blood glucose twice a day, alternating one day before breakfast and dinner and one day before lunch and bedtime. For those who use short-acting or fast-acting insulin, blood glucose should be measured 3 to 4 times a day, choosing to measure before or 2 hours after meals. For patients with strict blood glucose control, blood glucose should be measured 4 to 7 times a day, including before bedtime and 3 a.m. If there are symptoms of hypoglycemia, blood glucose should be measured in time; when blood glucose fluctuates greatly or combined with other diseases such as fever, infection and surgery, the number of blood glucose measurements should be increased; when blood glucose is more stable, the number of measurements can be reduced as appropriate. Precautions: Record the blood glucose test results and the use of medication and insulin; record the various causes of hypoglycemia and elevated blood glucose; understand the target of your blood glucose control and adjust the treatment plan under the guidance of the doctor; when the blood glucose is higher than the treatment target, when there is unexplained hypoglycemia or when the blood glucose is more than 13.3 mmol/L, you should seek the doctor in time; bring the blood glucose record book and medication and The blood glucose record book and medication and insulin records should be brought to each visit; ensure that the blood glucose meter works normally, the test paper meets the requirements and the measurement results are reliable. Understand the difference between the terminal blood glucose results measured by the blood glucose meter and the intravenous blood glucose results. Each time when measuring blood glucose, let the disinfection solution dry naturally, take blood from the needle at the right depth, and blood flow out naturally to be accurate. Blood glucose should not be tested immediately after exercise.