I am experiencing symptoms of itching basically all over. It seemed to have started when I had an appointment at the beauty shop and received a color treatment which caused my scalp to burn, tingle and eventually begin to swell with some weeping of sticky liquid and became very tender. It felt as if I could feel my scalp pulsating even. I also had some mild swelling at my forehead and around my eyes. Then I began to itch all over but seemingly especially my hands &feet, I noticed. And when I wash my hands under warm water they itch worse with stinging like feeling. I ve been taking Benadryl which has helped some but I still itch. What could this be and what do I do about it?