There are more and more diabetics in life. After suffering from diabetes, they attach great importance to blood sugar. They often measure postprandial blood glucose and fasting blood glucose, but sometimes they find that fasting blood glucose is higher. So, why is this happening? What is the cause of high fasting blood sugar? Today, we will popularize this aspect. What is fasting blood glucose? The so-called fasting blood glucose refers to the blood glucose measured after fasting for 8 ~ 10 hours, generally referring to the blood glucose in the morning fasting state. The ideal goal of diabetes treatment is to control the fasting blood glucose between 3.9 and 6.0 mmol/L, but it is difficult for sugar lovers to do so in real life. Generally speaking, there are three reasons for fasting hyperglycemia: 1. Improper dosage of hypoglycemic agents is the most common problem, which shows that blood sugar continues to be higher than normal after meals or at night, and fasting blood sugar increases obviously the next morning. The reason is the dose of hypoglycemic agents.

Insufficient use before meals or before going to bed can not effectively control postprandial blood sugar to normal levels. The solution is to find a doctor in charge of sugar friends to adjust the treatment plan and increase the dosage of hypoglycemic drugs reasonably, which can generally achieve satisfactory results. 2. Dawn phenomenon Dawn phenomenon means that sugar friends can control blood sugar fairly and stably at night without hypoglycemia, but their blood sugar is very high in the early morning. Dawn phenomenon is a kind of high blood sugar in the morning caused by the increased secretion of hormones such as cortisol and growth hormone, which antagonizes insulin. Sugar lovers with "dawn phenomenon" can take oral hypoglycemic drugs during the day and add subcutaneous insulin before going to bed, which can obtain good curative effect and control the phenomenon of high fasting blood sugar in the morning. It is best to add food before injection to avoid hypoglycemia after insulin injection. 3. Su Mujie reaction Su Mujie reaction refers to the morning hyperglycemia after midnight hypoglycemia.

The main reason is that excessive insulin induces hypoglycemia, and the negative feedback regulation of the body promotes the secretion of glucagon, growth hormone, adrenocortical hormone and adrenaline in the body to increase significantly, so hyperglycemia and urine sugar will increase after each hypoglycemia. Su Mujie's reaction to diabetic patients is mostly improper insulin dosage, or failure to eat on time, or increased physical activity under good control. For sugar friends who have "Su Mujie reaction", the dosage of oral hypoglycemic drugs or insulin should be reduced before meals, and the amount of meals should be increased before going to bed. Eating before bed is a separate meal of dinner, which can prevent hypoglycemia in the first half of the night. Anyway, there will be certain restrictions after diabetes, because there are many things that can't be eaten, which will bring some trouble to our family. Therefore, after suffering from diabetes, timely treatment, attention to a certain diet, optimism and positive, contribute to the rehabilitation of the disease.