My husband had 35 treatments of radiation for throat cancer. He finished treatments 22 months ago. He is doing fine. He was 58 when he was diagnosed. The last 3 weeks of his treatments he was only drinking Ensure. He was drinking 6 Ensure plus ( the one that has the most calories) a day, 2 for breakfast, 2 for lunch, and 2 for dinner. He would numb his mouth first with the mouth wash and then he would drink his 2 Ensure. He had a feeding tube but he never used it.
Before he switched to Ensure , I would make him very nutritious smoothies with protein powder, yogurt, almond butter, frozen avocado, etc. They were nutritious and full of calories. He had to stop drinking them because they were too thick, it was too hard to swallow.
For his neck, he used Aveeno cream. That is what was recommended at the hospital. He was treated at Princess Margaret. During the last week of the treatments he was putting saline compresses on his neck as his neck was getting quite red from the radiation treatments.
Don't hesitate to ask me if you have any questions.