Whether acute urticaria is serious or not depends mainly on whether the patient has a systemic reaction after producing acute urticaria, some serious, some not serious, as follows: 1. Serious cases: patients produce more serious systemic symptoms, such as the appearance of fever, or produce a drop in blood pressure, indicating a serious situation, especially after the patient produces acute urticaria, which may be accompanied by anaphylaxis, the situation is The situation is serious. In some cases, acute urticaria may be accompanied by laryngeal edema, which can also cause patients to suffocate and endanger their lives, which is also more serious. 2. Non-serious cases: If patients produce acute urticaria, which only manifests as itching of the skin or certain wind masses, etc., most of them can be relieved by certain anti-allergy treatment.