Obsessive-compulsive personality disorder
For a person with fully developed OCPD, actions and beliefs are either completely right or completely wrong, and they are always right. Because of this, interpersonal relationships are difficult as the person demands too much of their friends, partners, and children. When people do not do what they want, sometimes people with OCPD turn to anger and even violence. They often suffer from depression. This can sometimes be so serious that they might commit suicide. One study suggests that disorders like OCPD can make people more depressed than actually having major depressive disorder.