Allergies and urticaria are not different, allergies are a general concept, many clinical skin diseases are allergic, and urticaria is also an allergic skin disease, such as dermatitis, eczema, hives, drug rashes and other itchy skin diseases may belong to allergies. Urticaria is an allergic, limited edematous reaction, mainly manifesting itself as a generalized bout of wind, which subsides within 2-24 hours and then reappears the next day. The treatment of urticaria is mainly symptomatic and anti-allergy treatment.