4Įpidemiological data highlight the wide prevalence of visceral pain. However, the recent elegant research from Giamberardino’s group has prompted greater awareness of visceral hyperalgesia, visceral–somatic hyperalgesia and viscero–visceral hyperalgesia and the importance of these phenomena in the routine clinical management of patients with visceral pain. 1 – 3 Clinical models for visceral pain have been difficult to study. The mechanism of visceral pain is still less understood than that of somatic pain, in spite of ground-breaking research from eminent basic scientists clarifying the specific peripheral and central mechanisms involved. Visceral pain is not evoked from all viscera, not always linked to visceral injury, referred to other locations, diffuse and poorly localized and accompanied by motor and autonomic reflexes. Visceral pain is unique it is different to somatic pain. Although many types of visceral pain are particularly prevalent in women, for both men and women pain of internal origin is one of the most common reasons for consulting a doctor. All of us will have experienced pain emanating from our internal organs, from the mild discomfort of indigestion to the agony of renal colic. Visceral pain, the pain we feel when our internal organs are inflamed, diseased, damaged or injured, is by far the most common type of pain.
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