I had this red rash when I woke up one morning in Florida and took Benadryl and it went away in a couple days. We are now home for two weeks and this morning again I woke with the same red rash in the very same areas and is causing itching. I thought perhaps I got bit when in Florida so it is puzzeling me as to why the same rash is now appearing again here at home in Ohio. It looks like irregular red blotches and is now on my back in a few spots, The rash appears on my right shoulder and chest and back and not anywhere else on my body. Baby powder with corn starch seems to make it quit itching but I am wondering why I am getting it again in the same areas.