or mental illness, in which a person repeatedly acts as if he or she has a physical or mental disorder when, in truth, he or she has caused the symptoms. People with factitious disorders act this way because of an inner need to be seen as ill or injured, not to a concrete benefit, such as financial gain. They are even willing to undergo painful or risky tests and operations in order to get the sympathy and special attention given to people who are truly ill. Some will secretively injure themselves to cause signs like blood in the urine or cyanosis of a limb. Munchausen syndrome is a mental illness associated with severe emotional difficulties.