Medically reviewed by Benjamin F. Asher, MD Serous otitis media (SOM) is when the eustachian tube does not drain and causes fluid to build up in the middle ear space. The fluid build-up can cause ...

Ear pain can affect the outer ear, ear canal, ear drum, and middle ear ... or upper respiratory infection. Otitis media is more common in children because of the size and angle of their eustachian ...