Patients often ask: How often should I test my blood sugar? Is once a month okay? Is it okay to only measure fasting blood sugar? Some sugar lovers even think that I feel very comfortable, so my blood sugar must not be high and I don’t need to monitor my blood sugar. These situations are very common in clinical practice, and it is evident that some sugar lovers do not realize the importance of blood glucose monitoring. There is a very confusing phenomenon in diabetes, that is, often when the patient feels very good, the actual blood glucose level in the body is already much over the limit. Patients need to use a blood glucose meter at all times instead of feeling to keep track of their blood glucose. However, only 8% of patients in our country consciously have diabetes symptoms and go to the hospital to test their blood glucose, another 20% are found when they see their eyes (diabetes complications), and 10% have long boils on their skin and are examined to have diabetes. According to statistics, half of the diabetic patients already have a combination of macrovascular disease in their bodies when they first present to the hospital with the disease. Generally, there are 4-7 time points for blood glucose monitoring: morning fasting, blood glucose 2 hours after three meals in the morning, midday and evening, and blood glucose at 22:00, 0:00 and 3:00 at night, but it is often difficult to monitor blood glucose at night, so plain diabetics can monitor blood glucose at the first 5 time points at home. Patients with relatively stable conditions should monitor their blood glucose at least one day a week and 2-3 times a week if necessary under the condition of regular life; of course, they should monitor their blood glucose at any time under certain special circumstances, such as after strenuous exercise, increase in diet, stopping reasonable daily exercise or catching a cold, or when they have panic, sweating and other uncomfortable conditions. It is recommended that you make a good habit of keeping a blood glucose diary and write down the value of each measurement, so that you can bring it to your doctor when you go to the hospital for follow-up, which is more conducive to adjusting the medication. Only if you really understand diabetes, really eat reasonably, really exercise and exercise, really take your medication on time and really monitor immediately, can you lead a life like a normal person and reduce the occurrence of complications, and among these five items, the important one is “real immediate monitoring”, which is not only the diabetic’s “eyes” to understand their blood glucose situation, but also the “eyes” of the diabetic. It is not only the “eyes” of diabetics to know their blood glucose, but also the basis to measure the correctness and appropriateness of other means of blood glucose control, diet, exercise and medication.