I remember at least one other forum member reporting difficulty with excessive saliva production, also staring approximately 10-12 year post treatment. Initially my husband suffered from the usual thick saliva and dry mouth syndrome.

I wonder if hypersalivation is not reported or well studied due to the fact that in the past patients did not survive long enough to experience some of these late-term side effects. I will discuss this with ENT at next appt.
I doubt that there is a solution and it will most likely be added to all the other horrible side effects of chemoradiation for oral cancers.
Lottie