Hi, my full body itches, there is no mark or rash that causes the itch but there are cuts and breaks in the skin due to my intense scratching. Im going insane. I can take multiple antihistamine tabs and they don't work. I have tried every moisturiser I have tried no moisturiser. Sometimes i could bet something is crawling on me. Sometimes it's like, if you've ever felt a strand of hair on you but U can't seem to find it. Any ideas