The increase in the annual incidence of diabetes mellitus is 3-4%. Before the onset of insulin, death was inevitable. Acute complications of diabetes are ketoacidosis, severe hypoglycemia and hypoglycemic coma. There are many ways of delivering insulin. There are different types of insulin, by origin and by the action. The application sites are important insulin. Hypoglycemia is defined in Diabetes Mellitus when the number of blood glucose below 70 mg / dl. The diet should be guided by a nutritionist, at times and amounts. The exercise should be planned. The team must control a child with diabetes, should be an experienced team, understanding and knowledge of child development and adolescent diabetes mellitus and understood by the pediatric endocrinologist, pediatric, diabetes educator, nurse and nutritionist.