Olfactory dysfunction due to allergic rhinitis

Abstract

54-67% of patient with allergic rhinitis has olfactory dysfunction (anosmia, hyposmia). 21-45% of them also significantly decreases the olfactory threshold. Causes of olfactory disturbance are rhinosinusitis, sequel of cold, head injury and allergic rhinitis in decreasing order. Olfactory dysfunction due to allergic rhinitis is thought to respiratory disorder. They might be treating as at least both moderate and nose closed type by usual Japanese allergic rhinitis guideline. It is thought to be a relatively good prognosis and a pathological condition that can be improved by appropriate treatment.