I have had it for 9 years now. Its awful untreated, but i finally found a pill that stops it in about 15-30 minutes called Attarax. (Hydroxyzine is the generic) It works like a charm but is also a sedative, but if you have this bad enough youll just be happy to make it go away. its not a joke, like some people seem to think, judging by their comments. it can litterally drive you insane. Underwear, waistbands, stepping on something, scratching an itch, stress, heat, cold, anything will set it off.