Paranoia is a symptom of several mental health conditions. It can be found in paranoid personality disorder (PPD), one of the “cluster A” or eccentric personality disorders. Paranoia often happens to ...

Paranoia is often defined as the delusional belief that one is being persecuted or harassed by others. It’s often seen as a symptom of a serious mental disorder such as schizophrenia, delusional ...

Paranoia is a common word that's commonly misunderstood. "S/he's so paranoid!" can be heard in everyday conversation with the same incomprehension as saying someone is "OCD" because they're organized.