Linked from
The 6 pages that link to Otitis externa, each with the reason it gives.
Otitis mediaCompared with: Unlike otitis media, it affects the canal outside the eardrum.
Outer earRelated: This condition affects the canal, a principal component of the outer ear.
EarwaxRelated: Disruption of the canal’s protective environment can contribute to this condition.
Perforated eardrumCompared with: It affects the canal rather than requiring a break in the eardrum.