My skin is really itchy, benadryl isn t working. I am showering with Selsun Blue, allowing it to stay on me, from head to toe for five minutes at a time, and literally using it as soap and shampoo. When I get out of the shower I am using Shea Butter everywhere. This is an everyday thing. I am noticing horseshoe looking things everywhere, and they re multiplying. What do I do?