Paranoid personality disorder is an unwarranted tendency to interpret the actions of other people as deliberately threatening or demeaning. The disorder, surfacing by early adulthood, is manifested by an omnipresent sense of distrust and unjustified suspicion that yields persistent misinterpretation of others’ intentions as being malicious. People with a paranoid personality disorder are usually unable to acknowledge their own negative feelings toward others but do not generally lose touch with reality. They will not confide in people, even if they prove trustworthy, for fear of being exploited or betrayed. They will often misinterpret harmless comments and behavior from others and may build up and harbor unfounded resentment for an unreasonable length of time.