Joanna,
Sorry to hear of the burn problem. Is there a reason why you can't use anything now?
Although my mother has only completed her first week of conventional radiation, she was told to use "as pure as possible" aloe vera or Vitamin E. I was able to find some 98% pur aloe vera which I will deliver to her tomorrow. She can not use it immediately before or in between treatments but can use after second treatment and at night and any time on weekends.
Hope this helps.
Cynthia