Tinnitus is ringing or noise in the ears and can be a persistent and aggravating condition. These phantom ear 
sounds can occur in one or both ears, in people of all ages and can range in intensity and frequency from mild to very disruptive. It is relatively common with about 20% of people between 55 and 65 years old reporting symptoms on a general health questionnaire.
We have treated many patients with tinnitus complaints over the years. Our experience has shown us that cervical (neck) adjustments can have a positive outcome for some patients experiencing tinnitus. Several studies have looked at the connection between the muscles of the head and neck, cervical spinal bones and ear ringing. When the bones of the neck are aligned and moving properly and the head is balanced on the neck, nerve impulses from the spinal cord travel to and from the brain without interference. While each condition is different and not all cases have an origin in the neck, cervical adjustment may prove an effective alternative treatment for some patients.
Another suggestion that might be beneficial is the use of a white noise machine to help dampen the constant ringing sound. It should also be noted that in a study performed at the Institute of Noise Hazards Research in 1993 found that some people suffering from tinnitus also suffered from a B12 deficiency.
Additional Resources: American Tinnitus Association