I am on week 5 of radiation and chemo for tongue cancer at the base. The install of the peg tube has been a great thing for my situation. Taste and soreness on the roof and back made me upgrade my pain medicine to Oxycodone/ acetaminophene 5-323 mg tab. Two every four hours helps me sleep and eat soft fruit, mostly watermelon. By eating 4 to 5 cans of Abbott TwoCal HN a day, I have been able to only lose seven pounds over the last 5 weeks of treatment.
The main issues I have with the radiation is the skin around the neck and back. It has gotten more sore as the weeks go by. Two cremes were given and they work well, uni derm by smith@nephew and a stronger one, Triamcinolone Acetonide Cream usp 0.1% by perrigo.

Best of luck with his treatments!!!