Anyone's tinnitus can disappear completely at any moment. Don't despair. https://pubmed.ncbi.nlm.nih.gov/33637222/

Mine was from getting squeezed from flying with a sinus infection. I got rid of mine almost completely most of the time with hyperbaric treatment. I had the journal article saying this is common practice in Germany that I used to convince my ENT to refer me to a hyperbaric chamber, but I can't seem to find it.