When patients visit the clinic, they are quite distressed and complain of nasal congestion, headache, headache, itchy eyes, nose, ears and mouth, runny nose and sneezing. They generally complained that their symptoms were heavier than in previous years and that they were not doing well even after using many medicines. These are the results of repeated attacks, treatment at the onset, and discontinuation of medication when it gets better. What is the reason for this? It is caused by the remodeling of the nasal mucosa. We know that allergic rhinitis is caused by allergic reactions, when allergens enter the body, antibodies are produced in the body, and again allergens enter the antigen and antibody reaction, the above symptoms appear, when the above symptoms appear, the mucosa of the nose and airways will be damaged, the process of repairing the damage is called remodeling, the remodeled mucosa does not have the function of the original mucosa, so repeated episodes, repeated remodeling, the nose and The mucous membrane of the nose and respiratory tract becomes less and less functional, and the symptoms become more and more severe. For patients with seasonal allergic rhinitis, preventive treatment should be the main focus. This means that according to the characteristics of local pollen transmission, medication should be used 2-3 weeks in advance, until after the season, such as for autumn allergy, from 2-3 weeks before autumn to early winter. In the middle, after the symptoms are under control, the dosage can be reduced, such as using loratadine 1# once a day, budesonide 2 spray nasal once a day, montelukast sodium 1# once a day, and after 1-2 weeks of symptom control, loratadine ½# once a day, budesonide 1 spray nasal once a day, if the symptoms can be maintained, the dosage can be reduced again, using loratadine ½# once every 2 days, budesonide 1 spray nasal once every other day, or Stop one drug first, use one drug, and use another drug after a few days. If you use loratadine 1# 1 time a day, stop using the drug after 3-4 weeks, and use budesonide 2 spray nose 1 time a day. And so on. And so on every year thereafter. Of course the best way is desensitization treatment. If allergic to dust mites are treated with oral mite desensitizers.