I have the same exact thing. Dr does not know what it is. It came on after I had a weird reaction to aspirin -- took it on an empty stomach like a numbskull. He has treated me with prednisone, ranitidine (H2 blocker) which was great for heartburn but didn't make the itch go away, loads of antihistimines -- pills and topical creams, antifungal topical solution, etc. I think the problem is he is trying to treat the symptoms and the underlying cause is not related to the rash/itchyness. The really itchy times like you describe are more rare now, but my skin is still not healthy. I have bumps on my arms that don't go away and that are itchy in a different way than the random really itchy episodes. The really itchy symptoms like you described go away after they travel around to different parts of my body for a while -- anywhere from a few minutes in each location to a few hours, then I don't get those symptoms anymore for a while. This intense itching with accompanying welts used to last for days in each part before moving on to another part, so at least it feels like it's better, but not anywhere near gone. I desperately tried soaking in a bath with Apple Cider Vinegar added -- it's an anti-fungal, and I also use jojoba oil for my really dry skin and that has really worked better than any cream or lotion, even the ones prescribed by the dermatologist...then I read recently that jojoba oil too is an antifungal. So, hmmm. Not sure about any of this, and it's not 100% effective so maybe it's all in my head, but the natural antifungals do make me feel better for a while. And I get the added bonus of smelling like an easter egg after the vinegar bath :-).
Dermographism , connected to Urticaria, google it, I get it aswell funny since May 2008 also, but mine has got better yet not gone away, try a test in you arm the soft part , take a wooden spatula or any dull instrument and draw a line firmly on your arm, if you have dermographism it comes up in a red itchy wheal, doesnt last but a few mins, Check it out.
Hi
Thanks for writing to the forum!
After reading your post there are two things that come to my mind. One is eczematous dermatitis and the other is fungal dermatitis. Tinea versicolor is another condition that mimics your symptoms. The diagnosis is made by looking at the scrapings under microscope.
It is difficult to comment beyond this at this stage. Do consult another skin specialist for this. Please let me know if there is any thing else and do keep me posted. Take care!