Somatization disorders are characterized by physical symptoms that have no medical cause and persistent requests for treatment. Potential causes include genetics, low serotonin levels, psychodynamic factors like expressing unacceptable emotions through physical symptoms, family dynamics where illness reduces conflict, and learning that illness gains attention and avoids responsibilities. Types include somatization disorder with many vague symptoms, hypochondriasis with a preoccupation of having a serious disease, somatoform autonomic dysfunction with autonomically-controlled symptoms, and persistent somatoform pain disorder with severe pain. Treatment involves antidepressants, psychotherapy, and helping patients address psychological rather than physical factors and develop coping skills.