Hi and thanks for the query,
It is possible that the tube is blocked.
There is a tube called the eustachian tube (ET) that connects the nose to the ear.
It is meant for ventilation of the middle ear.
A malfunctioning ET can lead to accumulation of fluid in the ear.
Try decongestant nose drops like otrivin
for relief. The ET opens at the back of the nose. The drops will help to keep the ET open which helps in drainage
of the middle ear fluid.
Istill 3 drops 3 times per day for max of 5 days. Follow it up with steam inhalation.