When we talk about diabetes, what we can associate with is probably “three more, one less” and “is diabetic urine sweet?” Many people still have a superficial understanding of diabetes, but understanding diabetes in advance can help a lot in preventing it. So, how many types of diabetes are there? Type 1 diabetes occurs in children and adolescents, with a sharp onset and a clear clinical picture of “three more and one less”. type 1 diabetes is caused by a complete lack of insulin in the body, and some children develop it because of a genetic defect, which may be inherited from their parents. This type of diabetes can only be treated with lifelong insulin injections and insulin injections on time, otherwise ketoacidosis can easily occur and put lives at risk. Type 2 diabetes is the most common type of diabetes, accounting for more than 90% of the total number of people with diabetes, compared to type 1 diabetes. This type of patient’s body insulin is not completely missing, but the function is affected, type 2 diabetes patients are mostly obese, fat cells will resist with insulin, but also because of this and lead to diabetes. 3, gestational diabetes This kind of diabetes is divided into two cases, one is a woman before pregnancy has diabetes, and the other is a woman’s pregnancy only during the condition of diabetes. The second condition accounts for a relatively large number of people, but diabetes in this case will generally return to normal after delivery, but after that will increase the chances of patients with type 2 diabetes. The three main types of diabetes are common, except for type 1 diabetes which is more specific and has the only treatment available. The other two are more common, and there are many treatment options, especially obese type 2 diabetes, such patients in the past also need to take drugs for life to alleviate the disease, and can not be cured, to the late stage of the disease is also intensified. However, for obese type 2 diabetes, the best option is bariatric surgery for diabetes. Bariatric surgery directly reconstructs the gastrointestinal tract, allowing the patient to reduce food intake and thus achieve weight loss, and in the process, the body will recover with the reduction of fat cells in the body, thus reducing insulin resistance. Moreover, the secretion of insulin axis hormones is changed after the surgery, improving the glucose metabolism in the body. The biggest advantage is that surgery for diabetes is effective for a long period of time, and the body gradually recovers and gets rid of the trouble of taking medication for life.