Study design: randomized, double-blind, placebo-controlled, single, trial phase:0.
Inclusion criteria: patients referred to Besat Hospital clinic with chronic rhinosinusitis ( according to AAO-HNS) who have not responded to medical therapy and are candidated for FESS.
Exclusion criteria: age under 18 years and above 65 years; hypersensitivity to honey, pollen, thyme, bees; systemic diseases such as cystic fibrosis, immotile cilia syndrome, granulomatous diseases and diabetus mellitus.
Sample size:60.
Study objective: finding a better and more cost-effective way to treat chronic rhinosinusitis