The need to check the allergens of patients with urticaria depends on the specific situation, as follows: 1. No need to check allergens: If patients with urticaria have clearly identified the specific allergens, there is generally no need to deliberately check, and symptomatic treatment can be based on the specific performance of urticaria. The patient 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. 2, need to check the allergen: some people have recurrent episodes of urticaria, or the formation of a chronic state of morbidity, you can correspondingly check the allergen, to see if there are specific allergies to food or external substances, etc.. If the corresponding allergens have been checked, try to avoid allergenic factors in your future life and work.