Other prophylactic measures such as drying the ears with a hair dryer and avoiding manipulation of the external auditory canal may help prevent recurrence. The ear canal ( external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. Otomycosis, also known as fungal otitis externa, is fungal infections involving the external auditory canal and occasionally middle ear with high prevalence. Acidification with a topical solution of 2 percent acetic acid combined with hydrocortisone for inflammation is effective treatment in most cases and, when used after exposure to moisture, is an excellent prophylactic. Thorough cleansing of the canal is essential for diagnosis and treatment, but flushing should be avoided. Excessive moisture and trauma, both of which impair the canal's natural defenses, are the two most common precipitants of otitis externa, and avoidance of these precipitants is the cornerstone of prevention. Auditory hallucinations involve the sensory experience of hearing sounds or voices when there’s no external source for these sounds. ![]() The ear has outer, middle, and inner portions. ![]() Otolaryngol Head Neck Surg 2011 145(1):8085 with permission from SAGE. What is the ear canal The ear canal, or auditory canal, is a tube that runs from the outer ear to the eardrum. The most characteristic symptom is discomfort that is limited to the external auditory canal, while the most characteristic signs are erythema and swelling of the canal with variable discharge. Incidence of external auditory canal exostoses in competitive surfers in Japan. ![]() Otitis externa is most commonly caused by infection (usually bacterial, although occasionally fungal), but it may also be associated with a variety of noninfectious systemic or local dermatologic processes.
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