Paranoia is a rare but severe mental process characterized by the presence of intense fear and anxiety of a persecutory nature. Someone experiencing paranoia may believe that other people are out to get them and often cannot be convinced otherwise. She may feel as if she is being followed, recorded, watched, poisoned, or harmed in another way. Paranoia is a symptom of many psychological disorders and the defining feature of paranoid personality disorder.
Someone experiencing paranoia may be irrationally distrustful and suspicious of everyone. He may often feel betrayed, which can lead to anger or fear. People with paranoia have a hard time forgiving others because they are always concerned with the hidden motives of those around them. They can be argumentative and unable to relax as they constantly respond to feelings of persecution and criticism.
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