Lambru et al reported criteria for making the diagnosis of primary red ear syndrome (RES). The authors are from the National Hospital for Neurology and Neurosurgery in London.
Criteria for primary RES:
(1) The patient has a history of >= 20 episodes (see below).
(2) The episodes of external ear pain lasting <= 4 hours.
(3) The ear pain is accompanied by ipsilateral redness of the external ear.
(4) The ear pain has >= 2 of the following:
(4a) burning quality
(4b) unilateral
(4c) severity mild to moderate
(4d) triggered by thermal or cutaneous stimulation of the ear
(5) attacks may occur >= 1 time per day
(6) The pain is not better explained by another diagnosis.
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