Nasal freezing method can be used to relieve the discomfort brought about by chronic rhinitis, but can not play a complete cure. 1. Nasal freezing method refers to the rapid freezing method to effectively stimulate the mucous membrane, blood vessels and glandular tissues in the nasal cavity, which can constrict blood vessels, thus alleviating the edema and nasal obstruction symptoms in the nasal mucous membrane, and helping to alleviate the uncomfortable symptoms caused by chronic rhinitis. At the same time, nasal freezing can also effectively shrink the nasal turbinate, thus ensuring the nasal passage is smooth. Chronic simple rhinitis, chronic hypertrophic rhinitis, allergic rhinitis, etc. can use nasal freezing method. 2. Cryotherapy has the advantages of simple and quick operation, bloodless and painless, fast wound repair and satisfactory therapeutic effect, but the following complications may occur: (1) Localized swelling, transient; (2) Bleeding. It is usually temporary and mild; (3) Pain. Pain can occur during rewarming and thawing and can be relieved by analgesics or local anesthesia; (4) Fever. When the freezing range is large, it can be accompanied by absorption reaction fever, which usually lasts for 2 to 3 days and can subside on its own; (5) Scar formation. In the treatment of malignant tumors, or freezing damage to muscle tissue, scar repair can occur. Cryotherapy for chronic rhinitis needs to be used in accordance with medical advice.