Welcome to H.C.M
With little information and as per the history you have given and the clinical findings you may be suffering with eustachian tube dysfunction
. this is more worrisome when you go to higher altitude either in plane or on mountain. You need to put nasal decongestant drops while in plane and chewing gums will help to some extent. valsalva
maneuvre is helpful.
But still I would suggest you to consult the Specialist if you don’t get relief as on examination the findings may be different and line of treatment may have to be changed. Please don’t hesitate to consult and ask for any more query. i will be pleased to answer.
With best wishes for a speedy cure
The Health Caremagic Medical Team