I had my initial loading doses in March this year. After 8 days a rash appeared on the back of my neck. 3 days after I had finished the loading doses I started Vitamin D drops. My GP said it was the Vitamin D and told me to stop taking the drops. It took a few weeks but did eventually clear up. About a fortnight ago I had my top up B12 injection and 3 days ago a rash has started to appear in the same area of the neck. Now to complicate things I started taking folic acid 4 days ago. I am not sure what to do because if I contact the GP he will just say stop the folic acid. Has anyone had problems with rashes after the B12 injections and did they come straight away or appear after a period of time.
My GP said it wasn't the B12 injections but I am not sure how he knows that.