Munchausen syndrome is a factitious disorder characterized with intentional production or feigning of physical or psychological signs or symptoms, continuous hospital admissions and pathologic lying. Frequent and unnecessary testing and long hospital stays cause loss of investment and time both for individual himself and health care systems. Clinicians must bear in mind the diagnosis of Munchausen syndrome when unexplained clinical deterio-ration of patients occurs during course of a chronic physical disorder. In this case presentation, Munchausen syn-drome diagnosis given to an adolescent with diagnosis of type I diabetes mellitus and with hypoglycemia attacks leading to several admissions to emergency services, is discussed. [Anadolu Psikiyatri Derg 2016; 17(0.300): 91-93]