I remember jogging in high school gym class, about 15 years old, and asking the guy next to me, "does your brain bounce when you run". I remember the bewildered look he gave me and I never mentioned it again. Some days, it would feel like someone was hitting the back of my head with something every time my heart beat. I hated exercise for this reason. Other days, it wasn't there.
I think it has something to do with blood flow or spinal fluid flow. I've never been examined for CCSVI stuff. But something like that could be breaching our blood brain barriers. When I had my first flair I had brain swelling which caused memory damage. I would hurt to touch my temples or move my eyes.
Even now, I can do jumping jacks some days, and my head starts pounding with every pulse. Something weird about our brains and blood flow. I used to have a semi photographic memory. Now I can't remember the names of people I know, books I read, movies I watch, streets I've lived on. It's depressing.
Another angle is that I am very sensitive to cold weather, not just because I get cold hands and feet, but because It seems like it constricts the blood flow in my head even more. After a few mins in cold wind, I start getting headaches, my ears start aching, and I've been told that is another symptom other people don't get normally. But what do you do?
Another weird thing, potentially related, is I have noticed that for years, even before MS dxs, when I get a hair cut, and they use the clippers on my neck line, there is a spot where it gives me a strange feeling that is hard to explain. It is unpleasant, something like an itch under the skin, the affects the back of my neck all the way up to my jugular. Not painful, but strange eoung that I immediately want to touch my neck to make it stop.