Three weeks ago I learned I was B12 deficient (numbers in the mid 200s) and started injections. I live in the U.S., so am getting 100 mcg every two weeks. The day before my second injection, I noticed a rash that started on the tops of my feet, then trailed up my legs. A week later (today), it has gotten a little worse, and now goes to the tops of my legs. It seems most concentrated at my feet, then gets lighter from there. It does not itch or burn - I have no symptoms other than the appearance of the rash. I did a little research and it seems the deficiency can cause a rash, as can the injections, but I'm curious if any of you have experienced something like this. And if so, is there anything to be worried about? Thank you for any help you can lend!