What condition pertains specifically to a middle ear infection that typically resolves after a few months?

The condition that pertains specifically to a middle ear infection and typically resolves after a few months is serous otitis media. This condition involves the accumulation of fluid in the middle ear space, which can occur due to Eustachian tube dysfunction, often following a respiratory infection or an upper respiratory tract infection.

Serous otitis media is characterized by a non-infectious effusion that does not usually involve bacteria, hence it can resolve spontaneously and generally does not cause the severe symptoms associated with acute infections. In many cases, the fluid can clear up on its own within a few months without the need for antibiotics, making it a distinct condition compared to other ear-related issues.

The other conditions mentioned are different in nature. Cholesteatoma is a serious condition that results from abnormal skin growth in the middle ear and can lead to chronic infections and more significant health issues if not treated. Otitis externa is an infection of the outer ear canal, often called swimmer's ear, and it is not directly related to conditions within the middle ear. An aural polyp is a growth that typically arises in the ear canal or middle ear and can indicate chronic infection or inflammation, but it does not specifically describe a type of middle ear infection like serous