This case study examines a scenario involving Sarah, a patient diagnosed with Type 1 Diabetes due to insufficient insulin production. The case study explores the function of insulin, the impact of its deficiency, and the need for insulin injections to regulate blood glucose levels. It covers the use of NovoRapid insulin, including its onset, duration, and optimal timing relative to meals. The study delves into the causes, symptoms, and treatment of hypoglycemia, as well as the appropriate needle length for insulin pens. It emphasizes the importance of blood glucose monitoring before insulin administration and discusses the potential physiological and emotional challenges associated with daily insulin therapy, including diet restrictions, and the risk of complications such as retinopathy. The case study also highlights the need for emotional support for patients. The provided references support the findings and recommendations made throughout the analysis.