Hi
@Newbie6525, I have itching in the groin area although I had it before I started on the Metformin and I think it is a symptom of diabetes. That said, mine could also be down to the washing powder my wife uses so I don't panic about it too much. I also have a rash on the lower back which may or may not be from the Metformin, although I think it is the latter. But as it doesn't cause me any real issues again I don't panic.
Have you checked with your surgery (GP/Diabetes Nurse) to see if it could be a reaction to the medication? They may be aware of whether this is a known side effect. Alternatively they may want to review the issue with you to see if it is caused by something else.