Nasal congestion, sinusitis, allergies
When you have colds, sinusitis, or allergies, the mucosal lining of the Eustachian tube swells up. The swelling up causes the blockage.
An ear infection or otitis media causes an increased production of fluid inside the ear where viruses or bacteria will start to multiply. When this happens, you might feel ear pain as well as the feeling of plugged ears.
Adenoids are part of the immune system that can be found at the back of the throat just behind the nasal cavity. This mass of tissue keeps the body safe and healthy by trapping germs coming from the mouth and nose.
Enlarged adenoids are more common in children than adults. When a child has enlarged adenoids, it might cause blockage in the nose and the ears. The swollen adenoids hinder the draining of excess fluid in the middle ears, thus, making the ears plugged.
Colds and infections are the common causes of why adenoids become swollen.
Changes in altitude
Changes in altitude causes clogged ears because of the imbalance of pressures on both sides of the ear drum, causing it to be sucked inwards like what a vacuum does.
If you go to high places, such as mountains, skyscrapers, and if you are on board a plane, or diving in deep waters, you may experience plugged ears due to changes in altitude.
The changes in altitude can cause pain, muffled hearing, and the feeling of stuffiness in the ear.
The common symptoms of a blocked Eustachian tube include: