I had this for a couple of insane days and then it went away. I found rubbing, rather than scratching helped a little and kept me from wrecking my belly! I used the lotion, too, more than usual. Not sure why it came or went, but it drove me nuts!
You might want to turn down the heat of your shower a tiny bit, too. And not wear wooly sweaters. Maybe go to cotton for a little bit.
But I would ask your doc about Pupps. Especially with any rashes or with itchy hands or feet. And I would ask your doctor before trying any medication- even Benadryl or cortisone cream...