Diabetes is a chronic metabolic disease, mainly divided into four types: type 1 diabetes, type 2 diabetes, gestational diabetes, special types of diabetes, etc. Type 1 diabetes mostly occurs in adolescents, mostly younger than 20 years old, showing the typical three more than one less symptoms, and need to rely on insulin treatment. type 2 diabetes mostly occurs in adult patients older than 40 years old, can be combined with hypertension, hyperlipidemia, diabetes It can be combined with hypertension, hyperlipidemia, family history of diabetes, simple obesity, etc. Type 2 diabetes can also occur in adolescents. Gestational diabetes mostly occurs in women of childbearing age and can be detected as hyperglycemia before or during pregnancy. The age of onset of specific types of diabetes is related to the specific type of diabetes. Therefore the age at which diabetes generally occurs needs to be analyzed specifically according to the specific condition and the patient, and diabetes can occur at any age.