Personality disorders form a class of mental disorders that are characterized by long-lasting rigid patterns of thought and behaviour.
See also:
Because of the inflexibility and pervasiveness of these patterns, they can cause serious problems and impairment of functioning for the persons who are afflicted with these disorders..
For more information about the topic Personality disorder, read the full article at Wikipedia.org, or see the following related articles:
Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Personality disorder at Wikipedia.org. See the Wikipedia copyright page for more details.

