OverviewThe ear canal is lined with hair follicles and glands that produce a waxy oil called cerumen. Sometimes the glands produce more wax than can be easily excreted out the ear. This extra wax may harden within the ear canal and block the ear.
Review Date 8/4/2014
Updated by: Ashutosh Kacker, MD, BS, Professor of Clinical Otolaryngology, Weill Cornell Medical College, and Attending Otolaryngologist, New York-Presbyterian Hospital, New York, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.