Blood sugar is the concentration of glucose in the blood and is a valuable source of energy for the normal body. Normal adults need many sources of sugar each day to supply them with energy to enable them to provide the organ cells of the body with the energy they need to function. Therefore, blood glucose must be maintained at a normal level to sustain the needs of the body's organs and tissues. Blood glucose value for monitoring diabetes and some other diseases have a very good significance of guidance, the general meaning of the postprandial blood glucose, refers to the first bite of food from the meal, to two hours of blood glucose, if the postprandial blood glucose abnormalities, suggesting that there is a disorder of glucose metabolism, requiring further diagnosis and treatment. A normal person's blood glucose two hours after a meal is usually less than or equal to 7.8 mmol per liter.

Hypoglycemia is a syndrome in which plasma glucose falls below a certain concentration, leading to a lack of sugar in brain cells, and has many causes. The vast majority of patients are caused by inappropriate use of hypoglycemic drugs, and a few patients are closely associated with heavy fasting alcohol consumption. Other causes are less common. Typical symptoms of hypoglycemia are panic, sweating, hunger, loss of concentration, and tachycardia.

If the blood sugar is not corrected in time, there will be impaired consciousness, behavioral disorders, visual disturbances, convulsions, and even drowsiness and coma. If you are conscious of hypoglycemia, you should quickly eat a sugary drink, and if you are not conscious, you need to give glucose IV or IV push immediately. The key to hypoglycemia is prevention, and it must be closely identified with other cerebrovascular diseases such as coma and convulsions.