My wife had head and neck cancer at 28 , she’s was 52 and still had side effects.
For 24 years she had zero saliva , she just became accustomed to bringing water anywhere she went.
The “lockjaw” was more severe than most. When she got cold, stressed,or made certain movements it would lock up and be like a migraine for the day.
She unfortunately had a recurrence at 52.
The proton therapy was easier than her previous radiation, only sore in a small area.
She was not able to this second go around.
I blame her outcome over Covid. When she knew there was a problem, she couldn’t get a appointment anywhere, by the time she took her out photos and sent them to md Anderson, it was to far along.
Another side effect was spicy things and cold liquids hurt.
If you feel like your concern isn’t being paid attention to by your doctor, go get a second opinion right away. Early detection is critical for a good outcome.