Erythema and narrowing of the external auditory canal is most associated with which condition?

Erythema and narrowing of the external auditory canal is most associated with which condition?

• A. Acute otitis media
• B. Mastoiditis
• C. Labyrinthitis
• D. Otitis externa

Answer: (D)

Erythema and narrowing of the external auditory canal are hallmark signs of otitis externa, commonly known as swimmer's ear. This condition is characterized by inflammation of the external ear canal, often resulting from water exposure, trauma, or bacterial infection. The erythema indicates irritation or inflammation, while narrowing can occur due to swelling of the tissues within the canal. In contrast, acute otitis media primarily affects the middle ear rather than the external auditory canal, leading to symptoms associated with ear pain and pressure but not changes in the external canal itself. Mastoiditis involves the mastoid bone and usually presents with pain and swelling behind the ear, without the external canal's characteristic changes seen in otitis externa. Labyrinthitis affects the inner ear and presents with balance issues, hearing loss, and vertigo, not local changes in the external auditory canal. Therefore, the signs of erythema and narrowing are distinctly indicative of otitis externa, linking these symptoms specifically to this condition.

Erythema and narrowing of the external auditory canal are hallmark signs of otitis externa, commonly known as swimmer's ear. This condition is characterized by inflammation of the external ear canal, often resulting from water exposure, trauma, or bacterial infection. The erythema indicates irritation or inflammation, while narrowing can occur due to swelling of the tissues within the canal.

In contrast, acute otitis media primarily affects the middle ear rather than the external auditory canal, leading to symptoms associated with ear pain and pressure but not changes in the external canal itself. Mastoiditis involves the mastoid bone and usually presents with pain and swelling behind the ear, without the external canal's characteristic changes seen in otitis externa. Labyrinthitis affects the inner ear and presents with balance issues, hearing loss, and vertigo, not local changes in the external auditory canal.

Therefore, the signs of erythema and narrowing are distinctly indicative of otitis externa, linking these symptoms specifically to this condition.