Type I diabetes, also known as Type 1 Diabetes Mellitus, is a chronic condition where the pancreas produces little or no insulin. This autoimmune disorder typically manifests in childhood or adolescence, leading to high blood sugar levels. Patients require lifelong insulin therapy to manage their blood glucose levels effectively. Unlike Type II diabetes, which is often linked to lifestyle factors, Type I is primarily caused by the immune system attacking insulin-producing beta cells in the pancreas. Early diagnosis and management are crucial to prevent complications such as ketoacidosis and long-term health issues.