Syncope is a transient loss of consciousness due to a transient lack of blood supply to the brain, often accompanied by loss of muscle tone and inability to maintain an autonomous body position. Syncope is a common condition in children and adolescents and can have many causes. It is more prevalent in girls than in boys. The peak age of onset in adolescents is between 15 and 19 years of age. About 15% of children and adolescents before the age of 18 years have had at least 1 syncope. Moreover, syncope accounts for 1% of all pediatric emergencies. A survey among medical students with an average age of 20 years found that about 20% of males and 50% of females reported at least 1 episode of syncope. Syncope is a symptom, not a disease, and can be classified according to the cause of syncope: autonomic-mediated reflex syncope (AMS), neurologic, metabolic, psychiatric, and cardiac syncope. . Among them, neurally mediated (reflex) syncope is the most common cause, and vasovagal syncope (VVS) is the most common type of reflex syncope. Because metabolic and psychogenic syncope do not have a transient loss of consciousness due to a transient lack of blood supply to the brain, these syncope like conditions are referred to as transient loss of consciousness (TLOC) according to European and American syncope guidelines.