Welcome in H.C.M.
I have gone through query regarding sinus infection
and ear ache with squishing sound in ear.
I would like to tell you that due to your sinus infection there may be post nasal drip
which in turn creates infection in throat and ultimately reaches the ear via Eustachian tube and give rise to acute otitis media
, which hurts your ear and ear pops with unwanted sound in ear
Thus you are having sinusitis
with tinnitus. as far as treatment is concerned you should take antibiotics, anti histaminics, decongestants and steam inhalation.