Clovis I'm reading this years later and was wondering what you did and did it clear up?
You probably have psoriasis where you describe is exactly where mine started, if left alone and not treated it can and will spread to other areas. Prescription strength steroidal cream is the only thing that will make it heal anything else just stops the intense itch. I use Betamethasone Valerate cream, it's very strong and it works very well.
Just a quick note to say hi! Hey Clovis, I would recommend going to a physician and getting some real anti itch cream that actually works for you. Anything that is over the counter will not work for severe cases.