heat urticaria -->
cholinergic urticaria
medical dictionary

A form of physical or non-allergic urticaria initiated by heat (e.g., hot baths, physical exercise, pyrexia, exposure to sun or to a warm room) or by excitement; the rather distinctive lesions consist of pruritic areas 1 to 2 mm in diameter surrounded by bright red macules.

Synonyms: heat urticaria.

(05 Mar 2000)