Hi, for the past week I ve had skin itching, mostly on my back, legs and arms. Have been using benedryl gel, but it s been 7 days and you re not suppose to use it longer. Have also tryed cortizone 10. I think it may be just dry skin or a bug bite as it started right after I noticed a black + blue mark with a white center on my thigh. I m 70 y/0 and have just started using a body scrub in the shower. No changes in diet, new products . Thanks for any suggestions you can make