Patients with nasal inability to smell often suffer from obstructive factors in the nose. For patients with common inflammatory infectious and allergic disease factors of the nasal cavity and sinuses, the use of vasoconstrictor nasal spray drugs, anti-infective and anti-allergic drugs, and surgical treatment are required for rapid improvement, as follows: 1. nasal spray drugs: such as hydroxymetazoline hydrochloride nasal spray can rapidly and effectively reduce the inflammatory swelling of the nasal mucosa, thus improving the olfactory condition of the nasal cavity. 2. Anti-infective and anti-allergic drugs: Patients may need to take further oral anti-infective and anti-allergic drugs, such as roxithromycin capsules and loratadine tablets, according to the specific inflammatory or allergic influencing factors. 3. Surgical treatment: Some patients may have abnormal growths such as polyps in the nasal tract, which often require further surgical treatment measures.