
Eustachian tubes are small tubes that run between your middle ears and the upper throat. They are responsible for equalizing ear pressure and draining fluid from the middle ear, the part of the ear behind the eardrum. The eustachian tubes are usually closed except for when you chew, swallow, or yawn.
These passageways are small in size and can get plugged for a variety of reasons. Blocked eustachian tubes can cause pain, hearing difficulties, and a feeling of fullness in the ears. Such a phenomenon is referred to as eustachian tube dysfunction (ETD).
ETD is a relatively common condition. Depending on the cause, it may resolve on its own or through simple at-home treatment measures. Severe or recurring cases may require a visit to the doctor.