The treatment for the inability of the nose to smell, i.e., decreased or absent sense of smell, includes medication, physical therapy, and surgery. Diseases that may lead to decreased sense of smell include nasal inflammation, nasal polyps, nasal malignant tumors and so on. 1. Nasal inflammation: such as rhinitis, sinusitis. Inflammatory reaction leads to congestion and edema of the nasal mucosa, resulting in decreased sense of smell. Available antibiotic furacilin ephedrine nasal drops, glucocorticoid nasal spray, such as tretinoin nasal spray; can also choose ultrashort wave, infrared physiotherapy. 2. Nasal polyps: can cause decreased sense of smell, blocking the nasal cavity, can choose surgical treatment to remove the polyps, which can treat the symptoms of decreased sense of smell. 3. Nasal malignant tumor: according to the nature of the tumor, surgical resection can be chosen, supplemented by radiotherapy and chemotherapy. Nose can not smell the flavor, may also be caused by other reasons, should consult a doctor in time, after the diagnosis is clear, under the guidance of the doctor to regulate the use of drugs and treatment.