Since December I have had extremely itchy skin but NO rash at all. It doesn't leave marks on my skin either. But I am so itchy throughout the whole day I end up cutting my skin just through scratching! I've tried antihistamines but it's not working.  It has got to the point I have insomnia and wake up every night and can't sleep for a while. It's driving me crazy!! Now I have found a lump on my groin under the skin, you can't see it but can feel it  only 1 is swollen but it's it's about 2cm wide and is hard but moves slightly when touches. I am only 21 so hope it's just a cyst and the skin is a different issue - please can someone advise.