Hi, thanks for using healthcare magic
If there is no physical obstruction that can be seen, it is possible that the difficulty may be related to eustachian tube dysfunction
The eustachian tube is a tube that links the nasopharynx
to the middle ear. It has different functions.
Eustachian tube dysfunction is associated with a sensation of fullness or blockage in the ear and muffled hearing.
It can sometimes resolve on its own after a few days or weeks. In some cases the use of decongestant and anti histamines
can be helpful.
I hope this helps