I think this could be one of a few causes. I had a severe injury to the back of my head/neck when I was 15/16. I have kyphosis of my neck. Thinking back many of my symptoms started in my late teens but either I ignored it or it was contributed to other things.

As far as I know there is no history of MS in my family; however, my paternal grandfather's family is a complete unknown so it could be present and we just aren't aware of it.