I also tried acupuncture, chiropractic work, and diet changes. My only diagnosis, which is
what I think it is
brachioradial pruritis, but the only prescription for relief was more creams—no root of cause or lasting cure or solution. Only relief is ice. It started 10 years ago (was living in mountains of Colorado--sunny, but little humidity) in the summer. It comes back
every year around July/August and lasts thru December, disappearing just as suddenly as it returned.