Irritation from cold wind and water exposure causes the bone surrounding the ear canal to develop lumps of new bony growth which constrict the ear canal. Where the ear canal is actually blocked by this condition, water and wax can become trapped and give rise to infection. The condition is so named due to its prevalence among cold water surfers. Warm water surfers are also at risk for exostosis due to the evaporative cooling caused by wind and the presence of water in the ear canal.
Most avid surfers have at least some mild bone growths (exostoses), causing little to no problems. The condition is progressive, making it important to take preventative measures early, preferably whenever surfing. The condition is not limited to surfing and can occur in any activity with cold, wet, windy conditions such as kayaking, sailing, jet skiing, kitesurfing, and diving.
The majority of patients present in their mid-30s to late 40s. This is likely due to a combination of the slow growth of the bone and the decreased participation in activities associated with surfer's ear past the 30's. However surfer's ear is possible at any age and is directly proportional to the amount of time spent in cold, wet, windy weather without adequate protection.
The normal ear canal is approximately 7mm in diameter (about the width of a pencil) and has a volume of approximately 0.8 ml (about 1/6 of a teaspoon). As the condition progresses the diameter narrows and can even close completely if untreated, although sufferers generally seek help once the passage has constricted to 0.5-2mm due to the noticeable hearing impairment. While not necessarily harmful in and of itself, constriction of the ear canal from these growths can trap debris, leading to painful and difficult to treat infections. See images below.
In general one ear will be somewhat worse than the other due to the prevailing wind direction of the area surfed or the side that most often strikes the wave first.
- Decreased hearing or hearing loss, temporary or ongoing
- Increased prevalence of ear infections, causing ear pain
- Difficulty evacuating debris or water from the ear causing a plugging sensation
Surgery to remove the obstructing ear canal bone is usually performed under general anesthesia in an operating room and aided by the use of a binocular microscope. Most ear surgeons use a drill to remove the bone and may approach the area directly via the ear canal or by making an incision behind the ear and dissecting the ear forward. In using a drilling technique it is important to keep the thin inner ear canal skin away from the drill to preserve the skin and allow optimal skin coverage at the conclusion of the surgery.
Some doctors now prefer to use 1 millimeter chisels to remove the obstructing bone and enter directly through the ear canal. This technique enhances skin preservation. This technique may, in some cases, be performed under sedation with local anesthesia.
During recuperation from surgery it is extremely important not to expose the ear canal to water to minimize the chance of infection or complications.
Depending on the condition of the ear canal and the surgical technique used, the ear canal may require several weeks to several months to heal.
Unprotected exposure of ear canals to cold water and wind after treatment can lead to regrowth of bone and the need for repeated operations on the same ear.
The widespread use of wetsuits has allowed people to surf in much colder waters, which has increased the incidence and severity of surfer's ear for those that don't properly protect their ears.
- Avoid activity during extremely cold or windy conditions.
- Keep the ear canal as warm and dry as possible.
See also 
- Wong, B; et al. (1999). "Prevalence of external auditory canal exostoses in surfers". Archives of Otolaryngology, Head and Neck Surgery 125: 969–972.
- Kroon, David F.; et al. (2002). "Surfer's ear: External auditory exostoses are more prevalent in cold water surfers". Otolaryngology - Head and Neck Surgery 126 (5): 499–504. doi:10.1067/mhn.2002.124474. PMID 12075223.
- King, John F.; et al. (2010). "Laterality of Exostosis in Surfers Due to Evaporative Cooling Effect". Otology & Neurotology 31 (2): 345–351. doi:10.1097/MAO.0b013e3181be6b2d. PMID 19806064.
- Hetzler, MD, Douglas. "Relief for Surfer’s Ear". Palo Alto Medical Foundation.
- Whitaker, Samuel; et al. (1997). "Treatment of External Auditory Canal Exostoses". The Laryngoscope 108 (2): 195–199. doi:10.1097/00005537-199802000-00007. PMID 9473067.
- Mariezkurrena, X. Altuna; et al. (2004-08-24). "Prevalence of Exostoses Surfers of the Basque Coast" (PDF). Servicio de Orl. Hospital donostia, San Sebastian. "The objective of this study is to determine the prevalence of exostoses in a population of surfers of the Basque Coast"
- Samy, MD, Ravi N; et al. (2006-05-30). "External Ear, Benign Tumors". eMedicine, WebMD.
- Surfer's ear from Palo Alto Medical Foundation. Includes surgery videos.