I have been diagnosed with pa several months ago and have been receiving b12 injections monthly. I have been having shoulder, fingers and toe joint pain I know it sounds strange. The pain in my hands are the worst I can't open bottles or squeeze shampoo, sauce bottle etc. I'm finding it frustrating this pain comes on suddenly for no reason. I find after my b12 shots it's not to bad. Is anyone else having this same problem I'm just worried it will get worse or there is something else wrong! Any help would be great!