MY Husband Ended Radiation And Chemo Treatments For Cancer On

MY husband ended Radiation and chemo treatments for cancer on the base of his tounge in September. After several months of not being able to eat he was cleared to eat anything he wanted. He did a lot of speech therapy. Now he is having problems again, he seems to have liquids pooling in the back of his throat and unable to clear them. He was told his epiglottis was misshaped after treatments but was doing fine eating until the past several weeks. I'm worried as to what is wrong; any ideas?