I had several shots for back pain usualy 3 or 4 months apart. The last time I had one, before I got to the car I was so cold I felt like I was freezing, so I can relate to your being cold. I called the office concerned, only to have to leave a msg. No call back after 2 days. I was still feeling very cold, wrapped in lots of blankets & even using the heating pad, very little help. I called several more times to the Dr. office, I never got a call back. Very upset to say the least. I just wanted to know if this was a normal reaction, which I stated when I left my msg on their ans. machine. Needless to say, I never went back. This was about 7 or 8 yrs ago. To this day, I am still cold. I asked my regular Dr., she has no answer either. All my blood work comes back normal. I am still cold, but not like I was right after that last shot. I keep our A/C at 80 all year. It helps, but I am even cold at that. I wear socks all the time at home to help my feet, which is the coldest part of me and dress for warmth. My regular Dr. has checked me for circulation, it is normal. There is just no answer. There should be a reason, but noone has any answers. I also had back surgery 2 yrs ago, At least it didn't add to my being cold, but now facing hip surgery, but am not sure if I should have it. I have no pain, so have been putting it off. I can't see how anyone could have both done at the same time. I am wondering if age has anything to do with the coldness. I am now 84. Luckily I am in good health otherwise. Your being cold, too, is the first time I have ever heard someone else having this problem. My hair is also thinning, but I think it is age related. Hope you are better.