This document summarizes diabetes, which is an endocrine disorder characterized by high blood glucose levels due to issues with insulin production or action. There are two main types of diabetes: type 1 diabetes results from destruction of beta cells that produce insulin, leading to uncontrolled glucose production and hyperglycemia. Type 2 diabetes involves decreased sensitivity to insulin and less glucose uptake, also resulting in hyperglycemia. Risk factors, symptoms, complications, management, and treatment options are described for both type 1 and type 2 diabetes.