[Abdominal pain].

Abdominal and pelvic pain are the most common causes of referral to a gastroenterologist or gynaecologist, and the understanding of visceral pain mechanisms may contribute to a better diagnosis and treatment. Visceral pain is often perceived as a deep, dull and vague sensation with referral to somatic and other visceral structures, but when the peritoneum is involved the pain is more distinct and localised. Long duration or recurrence of the pain may produce permanent changes in the central nervous system, resulting in an increased sensitivity to external stimuli. These changes often involve other organs and somatic structures in the referred pain area. Finally, options for treating visceral pain are described.