Chronic urticaria is a complex disease, divided into many types, there are allergic factors, there are also non-allergic factors, such as (Helicobacter pylori) infection caused by urticaria, so I personally believe that not all patients should check allergens, allergens are only reference (detection rate is generally only about 5%, and also need to verify their own), to verify in life whether food or exposure to things that will cause the disease, adults will check allergens according to the needs of the disease, half of life will pass. Adults will check the allergens according to their condition, half of their life has to pass, if there is an allergy to something later in life, it is mostly a problem with their own constitution, so it is rarely checked; children can generally consider checking if they are resistant to treatment, the quality is inherent, find out if there is a natural allergy to something, to guide life and prevent disease recurrence.