Marijuana usage may worsen pre-existing cases of tinnitus. In some cases, tinnitus has been a side-effect of Lyme. Acoustic neuromas are small, slow growing benign tumors that press against or invade the auditory nerves. If your tinnitus is only in one ear, you should see your physician to rule this one out. An MRI will probably be required for a definitive diagnosis, but one contributor's ENT felt that an MRI wasn't warranted unless frequent dizziness was present.
Acoustic neuromas are removable by surgery but involve a risk of hearing loss.
Doing nothing should be considered an option by elderly patients since these tumors grow so slowly. They are confirmed with a CAT scan or other imaging, and may be surgically removable by a delicate procedure. This footplate forms the seal that separates the middle ear space from the inner ear. If the footplate is fixated, the vibrations cannot pass into the inner ear as well and hence a resulting hearing loss. Tinnitus may also be involved.