I have an awful rash - bright red and extremely itchy. I do not know what it is from but the only new thing to me recently is the jab. I have si for 11 days now but have stopped (last one was Monday) just in case it is the jab after I read this vitamins.lovetoknow.com/Sid... It has been mentioned it could be depleted potassium that caused the rash but I can't find info. Anybody got any knowledge re the rash with b12 injection. I am on the sick as I can't do placement on antenatal ward while I have a rash and now I am worried how long it will last as I need to keep up with my hours or fail the year. When I had vertigo there was talk of me stepping off the course temporarily as I cannot learn while ill and obviously cannot make decisions about the care of women if I am unable to think straight. I really want to stay with my current cohort and not drop back onto another cohort because I have had to take time out. Really, really worried.