(1) Inhalable allergens: such as indoor and outdoor dust, dust mites, fungi, animal fur, feathers, cotton tidbits, etc. This often causes perennial attacks; Plant pollen causes seasonal attacks.

(2) Food allergens: such as fish and shrimp, eggs, milk, flour, peanuts, soybeans, etc. In particular, some drugs, such as sulfonamides, quinine, antibiotics, etc., will cause disease.

(3) Contacts such as cosmetics, gasoline, paint and alcohol. In the hospital, we will do an allergy provocation test first to learn about the substances that cause allergies, that is, allergens, and the cost is about 220 yuan. Know what substance you are allergic to, and the doctor will advise you to avoid it as much as possible. If you are allergic to dust, you will suggest desensitization treatment, using 1-5 Dermatophagoides farinae drops, combined with flixonase brand fluticasone propionate nasal spray, fluticasone propionate and so on. , each time the cost is within 260 yuan. Desensitization treatment takes 2-3 years. The cost is around 5000 yuan.