For young patients with diabetes, it was previously thought that the probability of type 1 diabetes was higher, because type 1 diabetes is characterized by adolescent onset and predominantly ketoacidosis onset, with the most significant damage being renal impairment. However, in recent years, with the increasing incidence of obesity, it has been found that many young diabetic patients are also type 2 diabetics, and these patients have very pronounced insulin resistance and are in a state of severe obesity. In many cases, the body mass index can even reach more than 32-35. In this case, the occurrence of type 2 diabetes seems inevitable, because such a huge weight and obesity can produce a very obvious insulin resistance, coupled with the patient’s own unhealthy lifestyle, if combined with hypertension, hyperlipidemia, etc., it is easy to produce diabetes. Therefore, diabetes should not be judged purely on the basis of age, but in combination with general condition and insulin function, and specific treatment plans should be formulated after clear typing.