Miriam,
Everything starts to itch because of "histamines" in our blood...blood travels thru out our bodies therefore the itch all over... especially where the outbreak is. You need an internal as well as an external soulution. Benadryl (capsules) and Benadryl spray will help. Both are "antihistamines". Bathe not shower in an oatmeal bath..available at drugstores. then apply the Benadryl spray after. Wear very loose clothing. If this doesn't help. see the doctor. This can very easily turn into a skin infection. Hope it helps. I know from experience. Anne