hi. I understand that itching - no rash - everytime I get it, its been whilst taking abx. - I still can't decide if it is 'allergy' or 'herx' - mine started in hands and feet then spread - at one point it was all over - even in my eye balls!!
it comes on without warning then stops abrubtly - I am more inclined to believe it is part of 'herxing'. - I had intense herx. whilst on 'doxy' and the 'itching/prickling' was bad then.
I noticed if I don't rub/scratch it stops quicker - not easy!!