The urticarial rash is characterized by a set of seropapules , red or pink, sometimes discolored in the center, similar to nettle stings. They result, under the influence of an antigen-antibody conflict, from the local release of histamine , which offers papilledema with pruritus and burning sensation.. This eruption, of sudden onset, is fleeting. It usually disappears in a few hours or a few days, without leaving a…
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