Itchy Skin Cures

I have suffered with extremely itchy skin for probably the last twenty five to thirty years and it is worst in hot humid weather or sometimes in cooler weather if I have too many clothes on. It starts around my elbows and then spreads to the rest of my arms sometimes my back , neck and hands. I have seen many doctors and tried many different creams, soaps, tablets etc. Then around a month ago I started taking Krill Oil for my arthritis and miraculously my itch has gone.