According to the World Health Organization (WHO), diabetes ic characterized as a chronic metabolic illness and a major public health matter. It is recognizable by an elevated blood glucose level, or hyperglycemia, which can lead to numerous issues related to blood vessels, nerves, heart or kidneys. With a timely and holistic approach to the treatment of diabetes, we can greatly reduce the risk of acute and chronic complications and achieve a better quality of life and extend the expected duration. According to the American Diabetes Association (ADA), diabetes can be divided into 4 categories: type 1 diabetes, type 2 diabetes, specific types of diabetes and gestational diabetes. Many symptoms can indicate diabetes, some of the most common are dehydration, polyuria, nocturia, polyphagia, ketoacidosis, etc. The aim of this paper is to explain the role of the nurse in the education of patients on intensified insulin therapy . It is important to explain to the patient what insulin is, on wich way does it work and what it is aplied for. Above all to inform patients about the complications of diabetes, ways of eating in accordance with IIT, and the physical activity he is allowed to carry out with this type of treatment. The most important thing of all is appropriate and adapted communication between the nurse and the patient, which is the key to successfully conducted education.