What is "allodynia"

n. pain produced by innocuous stimulation of normal skin; may result from sensitization of central pain pathways in migraine.

Allodynia ( Ancient Greek άλλος állos "other" and οδύνη odúnē "pain") refers to central pain sensitization (increased response of neurons) following painful, often repetitive, stimulation. Allodynia can lead to the triggering of a pain response from stimuli which do not normally provoke pain. Temperature or physical stimuli can provoke allodynia, which may feel like a burning sensation, and it often occurs after injury to a site. Allodynia is different from hyperalgesia, an extreme, exaggerated reaction to a stimulus which is normally painful.