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Cholinergic Urticaria

Background

Cholinergic urticaria is one of the physical urticarias brought on by a physical stimulus. Although this stimulus might be considered to be heat, the actual precipitating cause is sweating. The definition and diagnostic testing of cholinergic urticaria has been the subject of consensus panel recommendations. (See Etiology, Presentation, and Workup.)

Cholinergic urticaria can be divided into the following four subtypes
:

Cholinergic urticaria with poral occlusion

Cholinergic urticaria with acquired, generalized hypohidrosis with idiopathic pure sudomotor failure and localized hypohidrosis showing sweat gland eosinophilic infiltration

Cholinergic urticaria with sweat allergy

Idiopathic cholinergic urticaria

See also the Medscape Drugs & Diseases articles Acute Urticaria; Chronic Urticaria; Contact Urticaria Syndrome; Dermographism Urticaria; Papular Urticaria; Pressure Urticaria; and Solar Urticaria.

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