Thanks for writing to H.C.M. for your query.
I have gone through your query regarding humming sound in ear with feeling of pressure, as you said your this ear had got hit by big boll about 10 years back.
As you said you are being examined by an ENT doctor and on examination your ear is O.K. but there are chances of sequlae of injury
. For this you should examined yourself by IMPEDANCE AUDIOMETRY
. By this there any ossicular chain abnormality can be diagnosed very well.
If on Impedance audiometery you are found to be normal than you should do-
(a) Take decongestant & mucolytic
(b) Steam inhalation.
(c) anti inflammatory.
(d) Vasodialators and caroverine
I hope this will help you. if unfortunately you don't get relief than HEARING AID
may be tried.