People with OCD often perform rituals, such as repeatedly washing their hands or checking to see if they have turned off the stove. People with OCD perform these rituals even though they know their behavior is illogical. An inflexible pattern of thinking and behavior that deviates markedly from what's expected can indicate a personality disorder. Dysfunctional perceptions, emotions, and control of impulses cause poor social and occupational adjustment. Personality disorders usually begin when people are teenagers or young adults.
Antisocial personality is diagnosed when people are always in legal or social trouble.
They are oblivious to parental or social punishment, showing reckless disregard for others and no remorse for their actions. Borderline personality is when people have a pattern of unstable relationships, an unstable image of themselves, difficulty controlling anger, and when they act impulsively, often putting themselves at risk. Paranoid personality is when people are unreasonably suspicious or distrustful of others. They believe that others are out to get them, even when that is not the case. Symptoms must be present for at least 6 months in order for schizophrenia to be diagnosed.