I have had the most itchy rash on forearms, wrists, elbows on and off for 3 years. I also have severe osteoporosis of the spine and was put on Oxycontin for pain about the same time rash started. After being on 4 different pain meds without any results, trips to ER, no relief. Three months ago the rash started from my knees down than to the outside of my...