Whether patients with urticaria need to check allergens or not needs to be determined according to the specific situation, as follows: a. No need to check allergens: If patients with urticaria have clearly identified the specific allergens, there is generally no need to deliberately check them, and symptomatic treatment according to the specific manifestations of urticaria is possible. Patients can take oral antihistamine drugs, while the appropriate external application of glyburide lotion, as long as the control and elimination of urticaria skin damage can be achieved. Second, the need to check allergens: some people have recurring episodes of urticaria, or the formation of a chronic state of morbidity, you can check the allergens accordingly, to see if there are specific allergies to food or outside substances. If the corresponding allergens have been checked, try to avoid allergenic factors in your future life and work.