Referred cutaneous allodynia in a migraine patient without simultaneous headache.

Cutaneous allodynia has been described in migraine. We report on a 39-year-old woman with migraine with aura who had cutaneous allodynia to both dynamic (brush) and static (pressure) mechanical stimulation between attacks. For both sensory modalities, the evoked pain on allodynia testing was located to the right frontal area (the location of her usual migraine headache), contralaterally to the stimulated skin area. There was no allodynia when the right frontal area was stimulated directly. We suggest the term 'referred allodynia' for this phenomenon and discuss possible mechanisms for its occurrence.