Factitious disorder imposed on self refers to the psychiatric condition in which patients deliberately produce or falsify symptoms and/or signs of illness for the principal purpose of assuming the sick role
Factitious disorder symptoms may include clever and convincing medical problems, frequent hospitalizations, vague or inconsistent symptoms, conditions that get worse for no apparent reason, conditions that don't respond as expected to standard therapies, eagerness to have frequent testing or risky operations etc.
The pathophysiology of factitious disorder is unclear. No causative brain defect or dysfunction has been identified. A study of 5 cases suggested neurocognitive deficits. One case study reported that single-photon emission computed tomography (SPECT) found hyperperfusion of the right hemithalamus in a patient