Nearly 10 years ago, I suffered a mild concussion with no unconsciousness. I hit the top of my head on the door frame of a small private aircraft. I developed a headache and it resolved with rest and an Advil. This is the first and only concussion I have ever had.

A couple days later, I had a migraine event with numbness in my right hand and the right side of my face. I also had trouble speaking - slurred speech and even difficulty thinking clearly.

After the migraine, I went to the hospital and had both a CT scan and MRI which were both negative.

A few days later, I woke up with dizziness/lightheadedness. It is not vertigo. I told the neurologist who ordered the MRI and he said that it was transient and would go away on its own. It has not gone away.

I have tried many therapies to combat my dizziness: vestibular rehabilitation, craniosacral massage, chiropractic (including NUCCA and Atlas), and acupuncture.

I have also seen an ENT. VEMP and CDP tests were normal. Caloric testing showed that I have a 26% left sided weakness. She said it is on the borderline of "significant" (25% or greater).

All the specialists I have seen told me that my dizziness would get better in time. After 10 years, I'm still dizzy and I think is actually getting worse. I seem to be ok for a few hours in the morning, but by the afternoon/evening, I'm usually too dizzy to do much more than sit on the couch or lie down.

There is no and never has been any rotational component to my dizziness. Occasionally I feel some pain on the back of my neck. It is almost as if someone is constantly pushing on the back of my neck with light pressure. My dizziness gets worse with motion, exercise, fatigue, hunger/thirst, mental stress, and complex visual stimuli. Although, I'm dizzy even when reading a book in a windowless room.

A few weeks ago, I started taking Ginkgo Biloba and vitamin B12, but they don't seem to be making a difference.

I'm not really sure what to try next. Thanks for your help.