Hi Bob, Welcome to Neuro Talk. I'm glad you found us. Not that we can dx any one, but perhaps we can give you support and some hints.

It has been ten years since you started getting symptoms, that is good that it hasn't gone much further in progression. I guess you will have to wait and see, there are so many diseases and disorders that have the same symptoms as you have.

You are lucky your symptoms don't last more than 8 hours. Do you take any medication? I always think to look in the medicine cabinet first to see if any side effects from any meds could cause problems.

As for the eyebrow and the head pain, is it the scalp that has pain? It could be nerve related. Maybe more people can help you that may follow this post. Good luck and nice to meet you.