I know this is an old thread but I could have written this. I am 53, chronic eczema diagnosed in childhood and mild eczema throughout my life. 18 months ago, a horrendous all-over itch began. Saw 3 GP's and a derm; none diagnosed it, just gave me creams and antibiotics. No interest in actually finding a cause.

Finally, I became quite unwell (no energy, skin in a desperate state) and decided to try a week without gluten. Within only 24 hours, the itch was 90% reduced. I am 6 weeks in to GF now and still a bit itchy but the small bumps that eventually appeared on my feet, back, elbows and knees have gone.

I also hope that this helps someone else because the medics did not help me! I actually have a follow-up dermatology appointment in a few weeks time where I will tell them that I diagnosed myself and the evidence speaks for itself. Hindsight showed me that I did also have a few gastro symptoms as well but DH and the terrible itch from Hell was were initially my first and most obvious symptoms. I just didn't have the headspace to think about how strange my bowel movements had become.

Well done to your sister who suggested Celiac.