With the continuous improvement of people’s living standards, people’s eating habits have also changed, and they often have unreasonable diets, including the intake of high-fat and high-calorie foods, which leads to the occurrence of some diseases, and diabetes is one of them. So, what are the causes that lead people to develop diabetes? 1, genetic factors: type 1 diabetes and type 2 diabetes are both characterized by genetic susceptibility. This genetic characteristic is more obvious in type 2 diabetes than in type 1 diabetes. For example, if one of the twins has type 1 diabetes, the other has a 40% chance of developing the disease; but if it is type 2 diabetes, the other has a 70% chance of developing type 2 diabetes. But unlike some congenital genetic diseases, if the offspring of diabetes pay attention to diet and exercise and other lifestyle adjustments from a young age, the chances of suffering from diabetes will be very small. 2, mental and neurological factors: In the process of the occurrence and development of diabetes, the important role played by mental and neurological factors is receiving more and more attention. Because the mental tension, emotional excitement, psychological stress will cause a large increase in the secretion of certain stress hormones, and these hormones are the hormones that raise blood sugar is also the hormone that fights with insulin. The long-term release of a large number of these hormones is bound to cause endocrine metabolic regulation disorders, causing hyperglycemia, leading to diabetes. 3, viral infection: some type 1 diabetes patients, is in the patient suffering from the flu, mumps and other viral infectious diseases after the onset of the disease. The mechanism is that after the virus enters the body, it directly invades the islet cells, destroys a large number of islet cells, and inhibits the growth of islet cells, which leads to a lack of insulin secretion and eventually causes type 1 diabetes. Autoimmunity: Type 1 diabetes is an autoimmune disease, and a variety of autoimmune antibodies can be found in the patient’s serum. The mechanism mainly lies in the fact that after the antigenic substances such as viruses enter the body, the internal immune system of the body is disturbed and a series of antibody substances against the pancreatic islet cells are produced. These antibody substances can directly cause damage to pancreatic islet cells, leading to lack of insulin secretion and becoming the cause of diabetes. 5, the popularity of modern lifestyle: eating high-calorie food and the reduction of exercise can also cause diabetes, which some people believe is also caused by obesity. Obesity is an important cause in the etiology of diabetes. It is especially likely to cause type 2 diabetes. Especially the abdominal obesity, which is often called “beer belly”.