A<unk>  can have one of many causes, such as: * infection (otitis media). This infection may then spread through the middle ear, and may reoccur. * trauma. This may be caused by trying to clean ear wax with sharp instruments. It may also occur due to surgical complications. * overpressure (loud noise or shockwave from an explosion). * inappropriate ear clearing. * flying with a severe cold, due to changes in air pressure and blocked Eustachian tubes resulting from the cold. This is especially true on landing.
Perforated eardrum
Pseudocyst of the auricle
Lethal midline granuloma
Meatal stenosis
Punctal plug
Fissured tongue
Thyroglossal cyst
Nasal septum deviation