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[Urticarial syndrome related to Treponema infection].

There are cases of patients having urticaria that do not respond satisfactorily to antihistamine treatment suggested by guidelines. In order to expand the search for associated factors, research about possible related infections have been performed. This paper describes the case of two patients evaluated in our center for hives resistant to standard treatment in which syphilis was diagnosed, with remission of urticaria when specific antibiotic treatment was established.