hi Helene,
i am so sorry your son inlaw is going through this.
i underwent advanced chemo and radiation last year at this. i finished my last radiation treatment on june 19th, one year ago and it was tough! the last week of my radiation, i was ready to quit and be done with it. the 2 weeks to follow were pretty bad as well. after that, things got better little by little. there were times i thought i would lose my mind over it and there were days where i just could not eat or drink anything at all without pain. the pain meds that gave me didn't work..and they were strong! however, the only thing they did for me was put me to sleep so i stopped taking them soon after i started. i would take teaspoons of manuka honey...that seemed help a little...not much, but it was better than nothing. my surgery was scheduled for early september as i needed to build myself up for it. when my time for surgery came around i had managed to put on a few pounds and was feeling good.
i wish your son inlaw the best of luck and hope he is feeling better real soon. tell him to hang in there...it does get better! keep us posted!
God bless!
-Stacey