I had nasopharyngeal cancer (cancer at back of nose) treatment in 2006, and diagnosed with dysphagia and severe neck fibrosis in 2020. Dysphagia is from late effects of radiation, same goes for severe neck fibrosis. With issues of swallowing and speech - this restricts my lifestyle, and am still trying to adapt and adjust my lifestyle - attempting to be ok on my own, as opposed to going out with friends (issue is mainly self - with issues of swallowing and speech). Have been told that there is no cure for late effects of radiation - only thing I can do is be diligent in doing the dysphagia exercise - in the hope that disabilities/issues will not deteriorate - to the point where a feeding tube is required !! (I was told that there are Head and Neck cancer survivors who have to have a feeding tube inserted to ensure intake of nutrition.)
Suggestion - check out exercises for dysphagia.