Olfactory impairment can be seen in chronic hypertrophic rhinitis, acute rhinitis, allergic rhinitis, etc. It is caused by nasal congestion that prevents airflow from entering the olfactory region normally, and needs to be treated according to the primary disease, such as oral proprietary medicines, anti-infective drugs, anti-allergic drugs, etc., and surgical treatment if necessary. 1. Chronic hypertrophic rhinitis: Chinese medicines such as Huo Bile Pills, Rhinitis Kang Tablets, and Bile Fragrance Rhinitis Tablets may alleviate the symptoms of nasal congestion and runny nose caused by rhinitis. 2. Acute rhinitis: early application of antiviral drugs such as morpholino guanidine and amantadine. Severe nasal congestion also requires the local use of decongestants such as ephedrine, contraction of the nasal mucosa, nasal congestion symptoms can be relieved. 3. Allergic rhinitis: Keeping away from allergens is the key to treating the disease. Oral loratadine, nidocromil and so on can be taken during the attack period to control the allergic symptoms. It is also necessary to combine hormonal nasal sprays such as budesonide, etc., which can relieve nasal congestion. It is recommended that patients seek medical attention to check the cause of the loss of sense of smell, and only when the cause is clear can the above medications be used appropriately under the guidance of the doctor, so that the sense of smell can be restored as soon as possible.