Allergic rhinitis to find allergens, there are two main methods: First, skin prick test, mainly in the patient’s arm with the original liquid of allergens to do experiments, if the local appearance of redness, swelling, stinging and itching and other changes, suggesting that the patient is allergic to the existence of this allergic liquid, but also to find the allergens. The disadvantage of this method is that some patients are prone to allergy after contacting the allergen, resulting in local discomfort, and individual patients may even experience anaphylactic shock and other related changes, which has a risk, but the overall risk is not great. Second, by drawing blood to check allergens, this is safer, belongs to the in vitro experiment. Through blood sampling to find out whether the patient is allergic to relevant substances, such as dust mites, pollen, animal fur, fruits, etc., and can also measure the concentration of total IgE antibodies to determine the severity of the patient’s allergens and so on.