I am not trying to scare you but you should really go to a doctor (that knows something about the side effects of lamictal) and have your rash looked at. It could be one of the severe side effects of lamictal. I know when I first started taking it my doctor warned me about a rash that is a severe side effect and should be attended to immediately. I did get a little rash on the back of my neck several times when first starting lamictal and I went to the doctor to have it checked out several times. It wasn't the rash that is the severe side effect, but it's worth getting it checked out. It's better to be safe.