Hives? High fever?

Urticaria is a common allergic disease in clinic. Urticaria and fever are not necessarily related. Urticaria patients may show fever. Under normal circumstances, urticaria caused by simple allergic factors will not cause high fever. But if it is an infectious factor, such as cold, pharyngitis, acute tonsillitis, etc., caused by urticaria, it can show high fever. It can be considered that urticaria rash and fever are symptoms of bacterial or viral infection. In addition, urticaria caused by drugs such as vaccines, penicillin, sulfa, etc. may also cause fever through immune reaction. Therefore, urticaria may cause high fever.