I get a weakness that starts in both arms at wrist and suddenly goes all way up arms then I have chills run across top of my head. No pain in head but arms feel so weak that I just have to sit still til it passed. this usually only last just few minutes. started out maybe every 2-3 weeks. I had one this week and it was only about a week ago since last one. It feels very strange. Talked to my MD and said my vit. D was low n put me on prescribed vit D, said could cause weakness. I have been on vit for about a month. my B 12 was also very low n been getting shot for 3 months. just wondering what problem could be?