“…The term vasomotor was applied to chronic catarrh in which no allergen could be detected. Some allergists hold that there is no such condition as vasomotor catarrh (or at least that the condition is rare) and that undetected allergens are the underlying cause 2 , 3 . Other writers disagree with this, believing that chronic vasomotor catarrh is often due to autonomic dysfunction or decreased vasomotor tone, with a number of possible precipitating causes 4 , 5 , 6 .…”