@Smitha – It is tinnitus. Tinnitus is the name of the symptom of hearing noise(s) in one’s head that have no source. The issue is finding out the cause of the tinnitus and trying to treat that.
@VikR105 – Gail has redirected us to your earlier question in which you were warned that a partial dose of antibiotics may not have killed all the bacteria and might result in an even stronger recurrence of the infection. Have you returned to the doctor?
I agree with Gail that the bruxism is likely a result of your stress and discomfort. However, it is not a separate issue – grinding the teeth, clenching the jaw or temporo-mandibular joint (TMJ) problems can cause or exacerbate tinnitus, because the jaw joint and the muscles controlling it are immediately anterior to the ear canal. When my chronic pain is flaring up, I tend to grind my teeth, and I can hear the muscles spasms like a fluttering noise, and the increased circulation to the area ratchets up the high-pitched ringing I’ve had as long as I can remember.
If the physicians are confident that there is no remaining infection or congestion in your ear, treating the jaw issues is the next step. Apply heat to that side to relax the muscles, massage the muscles around the jaw joint too. When I catch myself clenching, I open my mouth as wide as possible, as if in a yawn, and also move the jaw from side-to-side and all around to loosen the muscles, and then try to keep the jaw slack, where the teeth are apart just slightly. Dentists ban make you a custom moulded bite guard to help prevent grinding at night.