1.Somatization disorder: It is a neurological disorder dominated by a wide variety of frequently changing somatic symptoms. Symptoms can involve any system or organ throughout the body. It is much more common in women than in men and mostly develops in early adulthood.2. Undifferentiated somatoform disorder: The complaints of somatic symptoms are characterized by diversity and variability, but the typicality of what constitutes somatization disorder is insufficient and the duration of the illness is less than 2 years.3. Hypochondriasis: It is a neurological disorder dominated by the persistent dominant notion of fear or belief of having a serious somatic disease. Patients repeatedly seek medical attention for such symptoms, and various negative medical tests and physicians’ explanations fail to dispel their doubts. This disorder is present in both men and women and often has a chronic fluctuating course.4. Somatic form of funding neurological disorder: a neurological syndrome caused by somatic disorders in organ systems mainly innervated by autonomic nerves (e.g. cardiovascular, gastrointestinal, respiratory).5. Persistent somatic form of pain disorder: a persistent, severe pain that cannot be explained by physiological processes or somatic disorders. The course of the disease is prolonged and often lasts for more than 6 months.