Its an anaphylactic reaction. Could have occurred secondary to insect bite or due to mutton. Take a combination of levocetrizine with monteleukast for 5 days. Also start on fexofenadine 120 mg and cont therapy for a week. Severity of allergy or anaphylaxis should be assessed. Get a serum AEC , ESR, IgE levels.which will tell us regarding ur allergy status.