Hi,
Sorry that he is having pain. I would call the doctor or the radiologist who is treating him. While I was in treatment they gave me a number to call during off hours.
I received some information from another patient that helped me. I had chemotherapy and radiation in the mediastinum (middle chest) and my voice sounded like Minnie Mouse. She told me that her Dad drank aloe vera juice and it helped ALOT. I bought a gallon and I mixed it with tea and honey.
Everyone has different symptoms but they have a lot of medicine to counteract some of the discomfort of the chemo and radiation now. Please be sure to let them know how he feels... tired, nauseous, weak, pain etc.
My thoughts and prayers are with you.
Joan