This is an immediate but transient wheal response (localised swelling with redness) at the site of direct contact with the substance causing an allergic reaction. It usually resolves within a few hours, leaving normal skin. Contact urticaria can be confirmed by doing a skin prick test. Causes of contact urticaria include foodstuff, fragrances, flavouring agents, animal and plant products, preservatives, disinfectants and rubber latex. Avoidance of the causative agent is important to avoid recurrance of the rash.
Joke and Humors
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