A few months back I had sinus infection accompanied with buzzing ears. I consulted a doctor and got rid of headache, dizziness and all except the buzzing ear. Still I have a buzz/roar sound in my left ear. In certain head position (upright and back) it escapes, while it again escalates when I move my head forward down (looking down). It is very disturbing and has caused me lack concentration in anything I do. Please help me on this.