I developed an intense itchy rash that comes and goes after my surgery last October. It would itch and have a raised red rash that when disappearing a few days later turned into a bruise. There would be several locations at a time too. My internist put me on Zertec and sent me to a dermatologist.  The dermatologist examined me, when of course none of the rashy spots were active, and said it was hives and could be caused by a thousand things and gave me a prescription for some cream. Fast forward 6 months and my internist noticed a patch of the "rash" during an appointment and asked if that was the same rash from October and investigated further. After flunking a new blood test, to me,  of my Tryptase level he did a skin biopsy and follow up blood test 2 months later was even higher.  I then had a bone marrow biopsy and the tryptase level taken that day was even higher.  The biopsy results were normal so I know I don't have a MAST cell problem or cancer. Why my tryptase level is so high we don't know. For all I know it's been that way forever.

I'm telling you about this as your problems could be the sign of something underlying that could be serious. Also please get a prescription for come cream to put on it so the itching won't be so intense. The more you scratch the worse the itching becomes