This term describes a lifelong pattern of behavior that interferes with normal social interaction and function. There are a variety of named personality disorder types. Examples are "borderline personality" and "antisocial personality." Psychiatrists have made lists of very specific criteria that are used to diagnose a person with personality disorder. A personality disorder results in trouble with relationships, work and the law. Individuals suffering with these conditions feel their behavior is normal and only a few ever seek psychiatric help.