 In this context, it is noteworthy that most asthma patients, who underwent functional endoscopic sinus surgery for bilateral polyposis FESS-BP stated it dramatically improved their asthma after surgery. This improvement could be related to the effect of oral steroids these patients often receive after surgery, or the disappearance of nasal discomfort caused by nasal polyps as ventilation improves after the intervention. However, these reasons do not sufficiently explain the fact that this improvement, in some cases extends for months after surgery, when patients are no longer receiving oral steroids. 