Juvenile diabetes is generally dominated by type 1 diabetes, this is because the onset of type 1 diabetes is characterized by the onset of the disease in adolescence, as well as a tendency to show signs of ketoacidosis, but with the changes in socio-economics in recent years, more and more adolescents are suffering from type 2 diabetes. In developed countries like Japan, the ratio of type 1 diabetes to type 2 diabetes in adolescents is 1:1, or 50/50. In China, many adolescents are now found to have characteristics of type 2 diabetes, with obesity being the most critical risk factor, and obese adolescents are more likely to develop type 2 diabetes compared to the general population. The most crucial thing about juvenile diabetes is to clarify the type, also this is whether the patient is type 1 or type 2 diabetes, because the entire treatment program for these two types of diabetes is completely different, teenagers with type 1 diabetes need to use insulin for life to maintain the basic life, while teenagers with type 2 diabetes can often be diet, exercise and other methods of achieving the purpose of treatment.