Introduction: KOS represent an innovative non-surgical solution developed at the Karolinska University Hospital in Stockholm (Sweden) which consists of a intranasal stimulation via an air inflated catheter indicated to treat non allergic rhinitis and migraine. The KOS method for rhinitis has proved to be so effective as it simultaneously stimulates the nasal mucosa and the local autonomic nervous system, which represents the predisposing ltrastructural factor and is able to maintain the neurogenic inflammation responsible for the nasal symptoms of chronic rhinitis, very disabling for the quality of life of rhinitic patients.
