If you have a lot of bags on the skin, if the bag is a windbag, itching is obvious while scratching aggravated, but can gradually fade on its own, fade without leaving traces consider urticaria. Urticaria is a kind of allergic reaction and can be treated with antihistamines, commonly used as second-generation antihistamines such as loratadine and cetirizine, etc. If it affects sleep, first-generation antihistamines such as cycloheximide and paracetamol can be given, and in severe cases, glucocorticoids and epinephrine need to be given. In severe cases of urticaria, laryngeal edema, chest tightness and shortness of breath, and anaphylaxis can occur, which can be life-threatening. Therefore, if you feel that your voice is hoarse, your chest is tight, you can hold your breath, and you have panic attacks, you need to seek treatment in a timely manner. Urticaria needs to avoid hot and cold stimulation, spicy and irritating foods, and if there is an infection, it needs to be actively controlled, which usually does not recur.