There are hundreds of personality types and thousands of personality disorders. According to the Diagnostic and Statistical Manual of Mental Illness, a tool used by psychiatrists, psychologists and other mental health professionals to diagnose mental illness, there are seven main types of personality disorders. These seven types include schizoid, paranoid, schizotypal, antisocial, borderline, narcissistic and histrionic personality disorders. Schizoid personality disorder: This is when a person feels detached from social relationships, even if they want to engage with others. People with schizoid personality disorder may find it hard to express emotions, and they prefer solitary activities to social ones. Paranoid personality disorder: This is a disorder where a person has extreme distrust and suspicion of other people. The person will be suspicious that other people want to harm them, or they will be suspicious that they might be harmed. Schizotypal personality disorder: A person has unusual perceptual experiences such as distortions in perception, beliefs like magical thinking and paranoia, and odd behaviors. Antisocial personality disorder: A pattern of disregard for others with a tendency toward aggressive behavior, impulsivity and irresponsible behavior. Borderline personality disorder: A pattern of instability in moods, behavior, and self-image ranging from impulsive aggression to suicidal thoughts or self-injury. People with BPD often experience intense episodes of anger or depression that last days or even weeks. Narcissistic personality disorder: Narcissistic personality disorder is a mental health condition in which people have an inflated sense of their importance, a deep need for admiration and a lack of empathy for others. Histrionic Personality Disorder: People with histrionic personality disorder exhibit dramatic and overly emotional behavior, often drawing attention to themselves. Individuals with a histrionic personality disorder may exaggerate problems and emotions or create them in an attempt to gain attention. They are often perceived as superficial due to their constant need for attention. The key to identifying these personality disorders is by looking at the traits that the disorder causes in that person. Grouping together the different personality disorders based on similar characteristics.