Clinical Research Directory

Inclusion Criteria: 1. A diagnosis of CRSsNP based on the European Position Paper on Rhinosinusitis and Nasal Polyps 2020 (EPOS20). 2. The duration after endoscopic sinus surgery is 3months. 3. Olfactory dysfunction confirmed with the Sniffin's Sticks psychophysical test (TDI score≦30.5) . 4. Willingness to participate in this study and sign the informed consent form (ICF). Exclusion Criteria: 1. Patients with olfactory impairment due to traumatic, congenital, toxic/drug-induced causes, tumors, or post-upper respiratory infections. 2. Lund-Mackay olfactory cleft score \> 0. 3. Patients with severe comorbidities, such as malignant tumors. 4. Current or planned pregnancy prior to the end of study. 5. Patients who are unable to complete the study or are unable to comply with the requirements of the study (such as inability to tolerate olfactory function testing and treatment, memory or behavioral abnormalities, depression, smoking, heavy alcohol use, previous delinquent behavior)