Oh gosh I am sorry to hear that you had to go through radiation. My prayers are with you. When my late sister had her radiation she also had a rash and itching. She would sit in her bathtub and relax and she would put aveeno tablets in the water. And she said that helped some. She also did prescription benadryl but she didn't like that much as it made her sleep alot. I do hope that you find some relief soon.