Autosensitization dermatitis: A case of rosacea-like id reaction

Autosensitization dermatitis, or id reaction, is a cutaneous phenomenon in which an acute secondary dermatitis develops at a location distant from a primary inflammatory focus. The most commonly reported autosensitization dermatitis occurs in patients with venous stasis, with an estimated 37% of these patients experiencing 1 or more episodes of a dermatitis distant to the legs.1 Autosensitization also frequently results from cases of infection. The classic example of an infectious etiology resulting in autosensitization is tinea pedis causing an eczematous eruption on the hands and/or legs.