Today, here is the problem of obesity causing “three highs” and high blood sugar. Now people are busy, many friends once a year medical check-up can not guarantee. Only when you get sick to go to the doctor, it is likely that some of the friends suffering from the disease, can not be found in time. So here to give you a brief introduction to the dangers of high blood sugar. Hyperglycemia is the most direct symptom manifestation of diabetes, which is caused by absolute or relative deficiency of insulin in the body due to damage to pancreatic B cells or insulin receptor cells. Because the symptoms of hyperglycemia are not obvious, it is easy to be ignored. However, the harm of hyperglycemia is huge. What are the hazards of hyperglycemia? 1.Harm to blood vessels: The elevated blood vessels will increase the viscosity of blood on the one hand, and make the blood vessels thinner, more brittle and less elastic on the other hand. So that the entire circulatory system is impaired, blood flow is not smooth, blockage, and even make the whole body of the human body problems. Ischemia and hypoxia caused by hyperglycemia are the most important causes of various complications of diabetes. For example, the blockage of capillaries in the eyes will cause vision loss and fundus lesions; poor microcirculation in the hands and feet will cause coldness and numbness in the limbs; poor blood flow in the large and medium arteries around the heart will cause coronary heart disease; poor blood flow in the brain will cause cerebral infarction and stroke, etc. 2, the harm to the nervous system: elevated blood glucose makes the nerve cells of sugar alcohol accumulation, circulatory system disorders so that nerve cells do not get sufficient blood oxygen supply directly caused by nerve cell malnutrition and disorders of change. This leads to peripheral neuritis, plant nerve disorders and other neurological diseases. 3, the harm to the metabolic system: sugar, fat, protein is the three basic substances of human metabolism, high blood sugar leads to disorders of sugar metabolism, breaking the system metabolic balance, which often leads to disorders of lipid metabolism, resulting in problems with the entire metabolic system. 4, the harm to the immune system: high blood sugar and metabolic disorders caused by high blood sugar, so that the white blood cell phagocytosis and bactericidal power decreased, so that the immunoglobulin, complement and other production capacity is reduced, weakening the blood bactericidal power. At the same time, the vitality of cells and organs decreases, and the self-healing ability of the body decreases, resulting in dysfunctional and decreased immune function. Hyperglycemia is the most direct manifestation symptom of diabetes mellitus, which is a typical cell-damaging disease. Weight loss surgery has made it possible for most patients with diabetes caused by obesity to basically get rid of insulin. In some patients, weight loss allows blood glucose to return to the standard range. The dangers of hyperglycemia are briefly introduced here in the hope that more obese patients will pay attention to their health. Due to the weight loss, the body organs do not work under the “overload” environment, and restore the health state. Here I hope that obese patients should pay attention to their health and control their weight at the same time.