Somatoform disorder
Synonyms and Keywords: Functional disorders or Psychophysiological disorder or Psychosomatic disorders or Somatization disorders or Briquet syndrome or CFS or Chronic fatigue syndromes or Conversion disorder.

# Overview
Somatoform disorders are physical ailments (such as pain, nausea, depression, dizziness) or concerns for which no adequate medical explanation has been found. Somatoform disorders are physical symptoms that seem as if they are part of a general medical condition. However, no general medical condition, other mental disorder, or substance is present. 
The complaints are serious enough to cause significant emotional distress and impairment of social and/or occupational functioning.
A diagnosis of a somatoform disorder implies that psychological factors are a large contributor to the symptoms' onset, severity and duration. It is important to note that somatoform disorders are not the result of conscious malingering or factitious disorders.
In psychology, a somatoform disorder is a mental disorder characterized by physical symptoms that suggest physical illness or injury  symptoms that cannot be explained fully by a general medical condition, direct effect of a substance, or attributable to another mental disorder (e.g. panic disorder). The symptoms that result from a somatoform disorder are due to mental factors. In people who have a somatoform disorder, medical test results are either normal or do not explain the person's symptoms. Patients with this disorder often become worried about their health because the doctors are unable to find a cause for their health problems. This causes severe stress, due to preoccupations with the disorder that portrays an exaggerated belief about the severity of the disorder. Symptoms are sometimes similar to those of other illnesses and may last for several years. Usually, the symptoms begin appearing during adolescence, and patients are diagnosed before the age of 30 years. Symptoms may occur across cultures and gender.  Other common symptoms include anxiety and depression. In order for an individual to be diagnosed with somatoform disorder, they must have recurring somatic complaints for several continuous years.
Somatoform disorders are not the result of conscious malingering (fabricating or exaggerating symptoms for secondary motives) or factitious disorders (deliberately producing, feigning, or exaggerating symptoms)  sufferers perceive their plight as real. Additionally, a somatoform disorder should not be confused with the more specific diagnosis of a somatization disorder.
Mental disorders are treated separately from physiological or neurological disorders. Somatoform disorder is difficult to diagnose and treat since doing so requires psychiatrists to work with neurologists on patients with this disorder. Those that do not pass the diagnostic criteria for a somatoform disorder but still present physical symptoms are usually referred to as having "somatic preoccupation".

# Recognized somatoform disorders
The somatoform disorders recognized by the Diagnostic and Statistical Manual of Mental Disorders of the American Psychiatric Association  are:
- Conversion disorder
- Somatization disorder
- Hypochondriasis
- Body dysmorphic disorder
- Pain disorder
- Undifferentiated somatoform disorder - only one unexplained symptom is required for at least 6 months
Included among these disorders are false pregnancy, psychogenic urinary retention, and mass psychogenic illness (so-called mass hysteria).
- Somatoform disorder Not Otherwise Specified (NOS)
The ICD-10 classifies conversion disorder as a dissociative disorder.

# Proposed somatoform disorders
Additional proposed somatoform disorders are:
- Abridged somatization disorder - at least 4 unexplained somatic complaints in men and 6 in women
- Multisomatoform disorder - at least 3 unexplained somatic complaints from the PRIME-MD scale for at least 2 years of active symptoms
These disorders have been proposed because the recognized somatoform disorders are either too restrictive or too broad. In a study of 119 primary care patients, the following prevalences were found:
- Somatization disorder - 1%
- Abridged somatization disorder - 6%
- Multisomatoform disorder - 24%
- Undifferentiated somatoform disorder - 79%

# Diagnosis

## DSM-IV-TR Diagnostic Criteria for Somatization Disorder
The Diagnostic and Statistical Manual of Mental Disorders fourth edition, DSM IV-TR,defines somatization disorder as:
A. A history of many physical complaints beginning before age 30 years, occurring over several years, resulting in
seeking treatment, or significant impairment.
B. Each one of the following criteria must have been met, with individual symptoms occurring at any time:
1. Four pain symptoms (related to different sites or functions)
2. Two gastrointestinal symptoms (other than pain)
3. One sexual symptom (other than pain)
4. One "pseudoneurological" symptom (not limited to pain)
C. Either (1) or (2):
1. after appropriate investigation, each of the symptoms cannot be fully explained by a known general medical condition (GMC) or direct effects of a substance.
2. when there is a related GMC, the physical complaints or resulting impairment are in excess of what would be expected from the history, physical examination, or
laboratory findings.
D. The symptoms are not intentionally produced or feigned(as in factitious disorder or malingering).

## Patient Health Questionnaire-15 (PHQ-15)
The Patient Health Questionnaire-15 (PHQ-15) can help diagnose somatoform disorders.