DS7 is under stress, yes. Trigeminal nerve is what Dr. said.
The cluster headaches are caused by a nerve trap is how he put it. A loop.
Your post has been very helpful..... we are looking all over the web for pros and cons and while it seems like it may be a logical answer, I am not sure about it.
It seems to me that they should be able to test him blood for melatonin level to see if he needs it. I think this Doctor knows that we are not pill takers, we don't just happily swallow anything that is handed to us and announce were cured. I am going to do more research in it on before I give him anything.