i don't have a rash..but my right hip, towards the abs is VERY very itchy... i sort of remember getting it before lowcarbing though (so i don't think it's from lowcarbing), but i didn't think it could be from a food allergy as i didn't think i was allergic to anything.. One time both sides of my hips were soo itchy it drove me crazy. However there's no sign of rash, or bumps or anything..
I've been putting calamine lotion to cool it off.. b/c i'm going to damage my skin if i scratch anymore!..