One of the somatoform disorders, characterized by pain in one or more sites that causes marked distress or impairs occupational or social functioning. The pain may occur in the absence of any physical finding that might explain it (psychological type), or it may be related to an existing general medical condition.
A disorder in which pain is the predominant symptom, is of such severity to warrant clinical attention, and interferes with function. Psychological factors are important in the onset, severity, exacerbation, or maintenance of the pain. The condition is not intentionally produced or feigned.
A psychiatric condition characterized by the presence of pain in one or multiple body areas, which is influenced or exacerbated by psychological factors. Pain in the lower back is frequently encountered in association with this disorder.