A patient is reported in whom nine years of generalized urticaria of virtually daily appearance was suddenly terminated following dental extraction of her third molars. Although the patient gave no local or radiologic sign of infected teeth, the extractions disclosed surprisingly large foci of pus. The attention of the physician and dentist is directed again to occult dental focal infection as one of the easily overlooked causes of chronic urticaria.
Shelley WB. Urticaria of Nine Year's Duration Cleared Following Dental ExtractionA Case Report. Arch Dermatol. 1969;100(3):324-325. doi:10.1001/archderm.1969.01610270066015