pain

Pain results from tissue injury or inflammation:

acute vs chronic

neuropathic – due to damage or dysfunction of the central or peripheral nervous system

nociceptive – somatic or visceral – due to stimulation of nocireceptors (peripheral pain receptors) and conducted by A delta fibers and C fibers (sensory nerve fibers)

psychosomatic – categorized as somatoform disorders – chronic pain disorders, somatization disorders, hypochondriasis