Type 1 diabetes does not turn into type 2 diabetes. type 1 diabetes is an autoimmune reaction that occurs due to infections and other triggers, resulting in the destruction and failure of pancreatic islet beta cells. type 1 diabetes mostly occurs in children and adolescents, with typical symptoms such as polyuria, polydipsia, polyphagia and lethargy, and is prone to diabetic ketoacidosis, which requires insulin therapy. Type 2 diabetes mellitus has a family history of diabetes mellitus, and the age of onset is more than 40 years old, and can be combined with hypertension and hyperlipidemia. The main cause of type 2 diabetes is insulin resistance, but type 2 diabetes with a long duration of disease can also have insulin deficiency.