It's not a cure, and the sample sizes are low, but low level laser therapy (LLLT) has been shown to bring significant improvement to some people with tinnitus:

It's not a cure, and the sample sizes are low, but low level laser therapy (LLLT) has been shown to bring significant improvement to some people with tinnitus: "Over half of the patients (56.9%) had some form of improvement in their tinnitus symptoms. Mild improvement was reported in 33.8% of patients, moderate improvement was reported in 16.9%, and full improvement was reported in 6.15%. Of the patients who reported dizzy spells as a symptom of their tinnitus condition, 27.7% reported mild improvement and 16.9% reported full improvement." (My own note regarding that study: 5mW at 650nm does not penetrate tissue very deeply; one could e.g. use 100mW at 850nm to penetrate up to 5cm deep. Exposure time would likely have to be reduced by at least an order of magnitude.) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3658799/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3658799/ Also: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3830897/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3830897/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3063436/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3063436/