Most cases of mild age-related tinnitus are associated with high frequency hearing loss. The damage usually comes from chronic exposure to loud sound over a period of years. In some cases exposure to a medication contributes. Caffeine, salt, alcohol, stress, and fatigue can make it temporarily worse, but eliminating these things won't make it go away. There is no cure. In my case, it largely came from using earbuds in an urban environment, back in the days when portable music was in its infancy.