Recently I had a pretty bad sinus infection. I think the sinus infection was caused by misusing an ear drop product, called Ring Relief. It worked for me in the past and one day I thought of using it after months of no use as that day it was a bit annoying. I'm sure I left the drops in too long or the drops expired. Anyways for a good few weeks to a month the Tinnitus in my right ear suddenly had a whistle noise with it, where there wasn't any before. Usually it had only been tones of varying loudness, which were bearable. Right before I took medication my Tinnitus actually felt better, a few days before, and during the medication this high pitched ringing went away, for about two weeks total, and it was a blessing. I was taking Amoxicillin and Clavulanate Potassium Tablets USP 875/125 mg. While writing this the ringing went from a 5-6 to a 10 for about 10 seconds, which was scary as this is the first time it happened, and then dropped to a 6-7. I guess what I'm wondering is, why would my tinnitus get better during a sinus infection? Before the infection I was sick with plenty of mucus that made me hear my tinnitus more, but wouldn't a sinus infection make the ringing worse? Could there be another cause to this ringing? My tinnitus was caused from years of listening to loud music on headsets and headphones, not to mention loud vacuums from work.