Well, that's the last thing you need is a bunch of annoying itching.
Have you considered you might be allergic to a soap or laundry detergent? Or something else your skin is coming into contact with?
There are a few posters here who are quite informed about
mold issues—I am not but I have done a lot of reading on the
survivingmold.com website, very informative and may help provide clues if you could potentially have a mold sensitivity.
Also, have you considered a yeast/fungal problem? Did you include sugar in your elimination diet?
Last—are you taking any abx? I know itching is a common allergic reaction. SORRY—I just re-read your last comment. So, probably not from the abx. But you might be reacting to herbs if you are taking any?
Hope you find some clues.
-p