<prompt> True about Visceral pain:It is poorly localizedResembles fast pain produced by noxious stimulation of the skinMediated by B fibers in the dorsal roots of the spinal nervesCauses relaxation of nearby skeletal muscles  <response>: A i.e. It is poorly localized- Vanilloid receptors - VR1 are activated not only by pain causing agents capsaicinQ but also by protons temperatures above 43deg02.- Pain receptors are absent in liver parenchyma, lung alveoli, brain parenchyma, arachnoidmater, piamater, pial veins, choroids plexusQ- Perception of normal innocuous sensory stumuli eg touch as painfulQ is known as allodynia or different pain; whereas hyperalgesia is a hypesensitization of pain receptorsQ, thus lowering their threshold and causing exaggerated response on minor pain producing stumiliQ.- Visceral pain of thoracic abdominal cavities is transmitted through small type C fibers and so can only be of chronic aching-suffering type showing slow adaptationQ. Due to relative deficiency of A8 nerve fibers in deep visceral structures there is only very little rapid, bright, fast pain. Visceral pain is poorly localized2 often referred radiating, nauseating aw autonomous symptoms and spasm reflex contraction of nearby skeletal muscleQ.Pain - NociceptionPain is defined as an unpleasant sensory and emotional experience aw actual or potential tissue damage, or described in terms of such damage. Whereas nociception is unconscious activity induced by a harmful stimulus applied to sense receptors.Acute or physiological pain is considered as good pain as it serves an impoant protective mechanism like withdrawl reflex. Whereas chronic or pathological pain like inflammatory neuropathic eg causalgia pain can be considered bad pain. 