There is no age limit for diabetes. Anyone can get diabetes at any age, from infants and young children to elderly patients aged 80-90. There are several specific cases: 1. Children and adolescents, most of them belong to type 1 diabetes, showing typical three more and one less symptoms, prone to diabetic ketoacidosis, insulin deficiency is the main, the treatment needs to rely on insulin. However, there are also some obese pediatric patients with a family history of diabetes who have insulin resistance and may develop type 2 diabetes.2. Most adult patients are type 2 diabetics, mostly occurring in patients over 40 years of age, who may have a family history of diabetes, may have a combination of metabolic diseases such as hypertension and hyperlipidemia, and have both insulin resistance and insulin deficiency.3. In special cases, there are also some adult onset juvenile diabetes and other special types.