This document describes a case of a 41-year-old female patient with type 1 diabetes mellitus who presented with loss of consciousness. She has a history of recurrent urinary tract infections. On examination, she was found to have diabetic ketoacidosis, as evidenced by ketones and high blood glucose levels on urinalysis and blood gas analysis. Diabetic ketoacidosis occurs when a lack of insulin causes fat breakdown and ketone production, resulting in metabolic acidosis. The document outlines the mechanisms, management, and importance of prevention of diabetic ketoacidosis through patient education and insulin therapy.