What is Eustachian tube dysfunction and explain in detail?
Eustachian tube dysfunction (ETD) is a disorder where pressure abnormalities in the middle ear result in symptoms.

Signs and symptoms
Symptoms include aural fullness, ears popping, a feeling of pressure in the affected ear(s), a feeling that the affected ear(s) is clogged, crackling, ear pain, tinnitus, autophony, and muffled hearing.

Diagnosis
While Eustachian tube dysfunction can be hard to diagnose, due to the Eustachian tubes and the nasopharynx not being easily visible, usually a tympanometry is indicated, along with findings on an otoscopy