Hello @bxw3 and welcome to our little group.
You mentioned a runny nose as a side effect of your radiation treatments. This seems more common than one would think. I had two doctors look into this separately and they came to the same conclusion: it’s a reroute of a salivary gland or two. For me, only after a surgery for mandible replacement was mine corrected, more by chance than by plan. I no longer have to wipe my nose when I eat and I now have a much improved saliva flow for eating.
Of course knowing this doesn’t feed the bulldog but at least it is a plausible explanation.
Side note: I actually know someone with similar cancer treatment who has a saliva reroute out the side of her neck.
I guess if we didn’t laugh about this we would run screaming into the night.