Allergic rhinitis should have clear allergens, such as pollen, willow, artemisia, house dust mite, dust mite, fungi, animal fur, are clear allergens that can be identified. Hot and cold air is not an allergen, but the contents contained in the air may be an allergen. Therefore, if a patient is allergic to hot and cold air, the first step should be to check whether there are any allergens in the cold air and causing allergic rhinitis. If the allergy to cold air is not detected, one possibility is that the allergen is rather specific and not in the scope of the examination; another possibility, vasomotor rhinitis, is highly related to hot and cold stimulation. When a patient is stimulated by cold and heat, symptoms similar to those of allergic rhinitis, including sneezing, runny nose, and itchy nose, will occur, but its not allergic rhinitis without allergens. The treatment of vasomotor rhinitis is the same as that of allergic rhinitis. Anti-allergic drugs and nasal spray hormone can be applied to treat the disease, and good results can also be achieved.