question: The skin around my anus has become itchy...for several weeks. Upon inspecction this evening I noticed that I m losing pigmentation of my skin in that area. I have been diagnosed recently with several other conditions...alopecia areata, hashimoto thyroiditis, and alpha gal. Could any of these be the cause for this? What can be done to get rid of the itchiness? Preparation H and Witch Hazel don t seem to help much.