there are some TDCS treatments for tinnitus that seem to work
https://pubmed.ncbi.nlm.nih.gov/30359234/
But I'm pretty sure they are only available in the EU for now, not the USA
But I'm pretty sure they are only available in the EU for now, not the USA
https://med.stanford.edu/kbplab/research/recent-publications...
https://classic.clinicaltrials.gov/ct2/show/results/NCT01435...
https://classic.clinicaltrials.gov/ct2/show/results/NCT01541...