Mouth allergy itchy swelling, in the clinical mostly seen in local urticaria, especially giant urticaria, also called angioneurotic edema. You can use some topical medications to apply externally, you can apply topical Dinaid cream, or hydrocortisone butyrate cream, you can also use cold water externally appropriately. You also need to take oral antihistamine anti-allergy treatment, can be appropriate oral second-generation antihistamines, such as loratadine, or levocetirizine hydrochloride, epinastine, etc., but also appropriate oral glucocorticosteroid, such as prednisone, or dexamethasone, etc.. At the same time of these medications, try to avoid eating some spicy and stimulating food. Patients should also try to avoid local friction, or scratching, squeezing and so on. In normal life, try to avoid staying up all night, try to avoid fatigue.