I wonder if it happens more if you eat warm food or because you bend your head in a certain way.

I wouldn't go for surgery either. My cousin did because he could hardly breathe. It only became worse. My child seems to have the same problem. Says his nose is useless. Always closed but allergies too. So sneezing and billion of handkerchiefs. What he uses a week I haven't used in my entire life. At times he stuffs his nose with paperhandkerchief or toiletpaper if he keeps sneezing or his nose drips.
Therefore I have Sjögren...no fun either.