About 3 days after finishing 15 days of external beam radiation of tumor on left femoral head I developed radiation burn in the area. Hadn't experienced that on two previous occasions I had radiation. Just lucky I guess, after a little research I learned about 80-90% of radiation patients experience some degree of radiation burn after or during treatment. I' m told it should heal in about 2 to 4 weeks. Oncologists gave me some ointment to use on it.