Hi there ~
I understand your concerns. I believe that you are having a rash
that is not going away and is on certain regions in your body only. It can be a lot of things form your description. The first thing that comes to mind is atopic dermatitis
and I believe you need to consult a dermatologist
to get a proper diagnosis and get appropriate treatment for the condition. I hope and wish you the best in recovery.
I hope this helps. Take care and have a lovely day!