In this condition abnormal bony growth can obstruct the external auditory canal which is usually result of cold wind and water exposure. The true cause of the condition is still unknown but is usually seen in people who engage in surfing or kayaking in cold water. Since the condition is progressive it is of absolute importance to prevent further exposure to cold wind and water using earplugs, or cotton ball soaked with Vaseline covered with a swimmer’s cap.
In most cases no treatment is necessary as long as obstruction is not complete which can result in recurrent ear infections or conductive hearing loss. When the obstruction becomes problematic the exostosis could be surgically removed and the normal contours of the external auditory canal reestablished. At times very thin skin grafts are needed to cover the ear canal after the bony growths have been removed.
Images used with permission from Robert K Jackler