Well I have the same thing but it is my entire body. It started around my genitals though and in about a month my whole body was itching. No Rash and no matter how much I scratched it wouldnt stop. I would have probably killed myself by now but claritin seems to make the itch stop for 24 hours.\
Allegra also works and for some reason Bi Polar medicine stopped my itch too. I was taking seroquel for about 4 months and didn't itch.
Sometimes I wonder if I haven't shot my nerves from pills.