Psychiatry is the definition and treatment of mental disorders and diseases followed by treatment planning. Psychiatry is examined under two headings. One is adult psychiatry and the other is child-adolescent psychiatry. Adult psychiatry covers over 18 years of age while child-adolescent psychiatry covers under 18. The diseases diagnosed and treated by adult psychiatry are depression, anxiety, bipolar disorder, schizophrenia, post-traumatic stress disorder, panic attack, anxiety disorders, manic-depressive disorder, psychosis, social phobia, other phobias, obsessive-compulsive disorder (OCD), sleep disorders are in the form of addiction. The diseases diagnosed and treated by child-adolescent psychiatry are autism, dyslexia, peer bullying, down syndrome, school maturity, attention deficit and hyperactivity, tic disorder, learning disability, anxiety disorder, childhood depression, eating disorder, bipolar disorder, oppositional disorder are in the form of dependencies.