My Tinnitus was caused by poor posture and TMD. can modulate and cause spikes by turning my head, tilting my head from left to right with ears toward shoulders, pushing on the sides of my nose, pulling down on my scm muscles, Shrugging my shoulders and bringing my shoulders way back, swallowing. jutting out my jaw, etc.
These are temporary spikes that go away and back to baseline (mild and some days not even noticeable) when released or moving the affected body parts back to normal position.
Lack of sleep or any type of heavy lifting will cause an increase of baseline until muscles have stopped spasming and more sleep and rest are achieved.
Used to be so bad i was suicidal when it first came on (It was extremely debilitating) however cervical work on my C1 and C2 as well as cleaner eating, Magnesium citrate and glycinate supplements, vitamin D3, Liposomal C, B12 shots once a month, and plenty of water have helped tremendously.....along with swedish massage of all my head, neck, shoulder, and upper back muscles are a work in progress and will be starting with a PhysioTherapist specializing in Myofascial trigger point release of affected upper body and head muscles.