The expression levels of IL‐4, IL‐5, and TNF in CRSwNP were significantly elevated compared with those in the control group (Figure 2A), whereas the expression levels of IL‐4, IL‐5, and TNF were greater significance in the eosinophilic CRSwNP group than in the control group (Figure 2B). Here, IL4 is linked to chronic rhinosinusitis with nasal polyps.