Patient’s diabetes self-management is now considered as a key element for diabetes care and the progress of the disease. Diabetes self-management education gathers a series of practices to improve patients’ knowledge and abilities to self-manage the disease and treatment. This thesis explores two elements which can impact on daily patient’s diabetes self-management. The first element relates to diabetes self-management education implementation: Are the diabetes education interventions implemented to the patients as initially intended? The second element is related to the patient’s emotional experience: Do depression, anxiety or diabetes-related distress hinder the utilisation of appropriate knowledge to self-manage the disease? And does the emotional intelligence act as a protective factor against the development of emotional disorders related to the disease?