Which history is characteristic of id reaction (autoeczematization)?

Updated: Oct 16, 2020
  • Author: Matthew P Evans, MD; Chief Editor: Dirk M Elston, MD  more...
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Id reactions result from a variety of stimuli, including infectious entities and inflammatory skin conditions. Dermatological manifestations vary and depend on the etiology of the eruption. General history may include the following:

  • Varying degrees of pruritus are typically noted.

  • An acute onset of an extremely pruritic, erythematous, morbilliform, or papulovesicular eruption occurs 1-2 weeks after primary infection or dermatitis. Id reactions associated with stasis dermatitis are usually symmetrical and, in descending order of frequency, involve the forearms, thighs, legs, trunk, face, hands, neck, and feet.

  • Id reactions are usually preceded by exacerbation of the preexisting dermatitis induced by infection, scratching, or inappropriate therapy. (Id reaction to tinea incognito has been reported. [19] )

  • Reactions have previously been reported after radiation treatment of tinea capitis.

  • Vesicles may be present on the hands or feet.

  • Fingers may be tender.

  • Travel history relating to infectious agent exposure may be relevant.

  • A history of cultural or religious practices may indicate possible contact allergens leading to an id reaction.

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