Welcome to HCM.
Understanding your concern. As per your query you have tinnitus
since 2 years which can be cause by many factors like stress , temporomandibular joint problem , wisdom tooth , cervical spondolysis and increase blood pressure. Main cause of tinnitus is either overall increase in blood pressure or local increase in blood pressure do to blood vessel dysfunction. Need not to panic about it. I would suggest you to consult ENT specialist
for proper examination . Doctor may order certain test like audiometery , CT scan
,MRI , low and high pitched ringing to rule out conditions like hearing loss
, exposure to loud noises , earwax build-up , middle ear infection
. Yes you can fly as mentioned in query you have to put cotton plugs in ear to maintain pressure. Keep your ear drops along with you.
Hope your concern has been resolved.
Get Well Soon.
Dr. Harry Maheshwari