All this talk of acid reflux reminds me of an experience I have sometimes.
I don't know whether it's acid reflux or something else.

Sometimes, when I am eating some fairly lean protein (e.g., cooked chicken
breast or canned tuna), I can eat a number of mouthfuls quite normally, and
then suddenly I get to a point where I swallow, but it doesn't go down
easily any more. It seems to sit in my throat and feels very uncomfortable
for a while.

The suggestions here for acid reflux haven't included anything like this -
so I am wondering what might cause this situation to occur? Is it simply a
lack of lubrication through the absence of enough fat? But if that is the
case, why can I eat quite normally for a while, and then have this sudden
change from one mouthful to the next?

Barbara