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The best option will be to see an ENT (Ear Nose Throat) specialist.
There may be infection in the middle ear.
Or the pressure inside the ear is more -
You can try OTC Over The Counter) decongestant nose drops -
There is a tube (Eustachian tube) connecting the throat to middle ear and if blocked, you may feel like this - Decongestant drops, throat lozenges can help. Try Valsalva
manoeuvre - it may open the tubes
tablets are useful in some cases.
Wishing speedy recovery