A tympanic membrane that is erythematous is most consistent with which condition?

• A. Acute inflammation
• B. Coughing
• C. High fever
• D. Crying

Answer: (A)

Erythema of the tympanic membrane signals a local inflammatory process in the middle ear. When infection or inflammation affects the middle ear, the mucosa swells and blood flow increases, making the tympanic membrane appear red and often enlarged or bulging. This finding is best understood as acute inflammation, such as in acute otitis media, rather than being caused by coughing, high fever, or crying alone. Coughing or crying can accompany illness, but they don't directly produce the red, inflamed TM that defines acute inflammation of the middle ear.