Clinical - Endoscopic features: Rhinorrhea: 93.53%; Nasal congestion: 90.85%; Headaches: 78.79%; Anosmia: 31.47%; Total SNOT-22 score: 32.47 ± 14.32; Moderate VAS score of 4 main symptoms (nasal congestion, rhinorrhea, headache, anosmia) accounted for: 76.34%, 75.67%, 68.53%, 61.16%.