Otitis externa causes

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Otitis externa Microchapters


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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Luke Rusowicz-Orazem, B.S.; Tarek Nafee, M.D. [2]


The primary cause of otitis externa is bacterial; the majority of cases result from Pseudomonas aeruginosa or Staphylococcus aureus infections. Otomycosis can cause otitis externa with primary infectious fungi including Candida albicans and Aspergillus niger. Allergy-caused dermatitis can cause non-infectious otitis externa if it spreads to the ear canal; this includes inflammatory dermatoses such as eczema, seborrhea, and psoriasis. Contact dermatitis can cause otitis externa from allergic reactions to cosmetic chemicals and metals. Rarely, psoriasis therapy secukinumab can cause otitis externa as an adverse reaction.


Causes of otitis externa include all sources of inflammation of the external ear canal.[1]



Allergic Reactions

Drug interaction

Causes by Chronicity

Chronic Otitis Externa

Acute Otitis Externa


  1. 1.0 1.1 Hajioff D, Mackeith S (2008). "Otitis externa". BMJ Clin Evid. 2008. PMC 2907945. PMID 19450296.
  2. 2.0 2.1 Williams, K. P.; Gillespie, J. J.; Sobral, B. W. S.; Nordberg, E. K.; Snyder, E. E.; Shallom, J. M.; Dickerman, A. W. (2010). "Phylogeny of Gammaproteobacteria". Journal of Bacteriology. 192 (9): 2305–2314. doi:10.1128/JB.01480-09. ISSN 0021-9193.
  3. Roland PS, Stroman DW (2002). "Microbiology of acute otitis externa". Laryngoscope. 112 (7 Pt 1): 1166–77. doi:10.1097/00005537-200207000-00005. PMID 12169893.
  4. "Swimmer's ear : MedlinePlus Medical Encyclopedia".
  5. 5.0 5.1 Rosenfeld, R; Brown, L; Cannon, C; Dolor, R; Ganiats, T; Hannley, M; Kokemueller, P; Marcy, S; Roland, P; Shiffman, R (2006). "Clinical practice guideline: Acute otitis externa". Otolaryngology - Head and Neck Surgery. 134 (4): S4–S23. doi:10.1016/j.otohns.2006.02.014. ISSN 0194-5998.
  6. Kang K, Stevens SR. Pathophysiology of atopic dermatitis. Clin Dermatol 2003;21:116–121.
  7. "DailyMed - COSENTYX- secukinumab injection".
  8. Schaefer P, Baugh RF (2012). "Acute otitis externa: an update". Am Fam Physician. 86 (11): 1055–61. PMID 23198673.

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