There are many types of allergens in rhinitis, including the following: 1. dust mites, including house dust mites and dust mites, which are widely distributed on bed sheets, pillowcases, sheets, and the table tops of the house, as well as in the hair of patients. 2. flowers and trees, including various kinds of pollen, tree leaves, etc. 3. animals, including dogs, cats, rabbits, etc. parasites, viruses, bacteria, animal excrement, etc. 4. poultry, including chickens, ducks, geese, excrement, etc. can also constitute allergens. 5. The allergens can also be found in poultry, including feathers and excrement from chickens, ducks and geese, etc. Some drugs, such as cephalosporins and penicillins, can also become allergens once applied by patients. There are actually many clinical allergens for rhinitis, and the above are just some of the more common ones.