There is no quick fix for not being able to smell (odor) through the nose, and the cause needs to be addressed. Nose can not smell the odor, may be respiratory tract infection, allergic rhinitis or nasal polyps, etc., can be relieved by taking antiviral drugs, anti-allergic drugs or surgical removal of polyps and other methods. 1. Respiratory infections: Respiratory viral infections cause mucosal damage in the olfactory region and nerve damage resulting in the nose not being able to smell, which can be relieved by taking oral antiviral drugs such as acyclovir tablets and ribavirin tablets. 2. Allergic rhinitis: Allergic rhinitis may cause decreased sense of smell, which can be relieved by taking second-generation antihistamines, such as cetirizine hydrochloride tablets, loratadine, etc.; glucocorticosteroid nasal sprays, such as fluticasone propionate nasal spray, etc.; and rinsing of the nasal cavity with saline. 3. Nasal polyps: nasal polyps blocking the nasal cavity may cause a decrease in the sense of smell leading to smell, can be removed through surgery to remove nasal polyps, after surgery, patients also need to cooperate with the glucocorticoid nasal spray, such as fluticasone propionate nasal spray, etc., to reduce the edema of the surgical cavity. Symptoms of the nose can not smell the odor, should promptly go to the hospital to identify the cause of the disease, under the guidance of the doctor’s medication as well as surgical treatment.