Eat any foods with a lot of acid?
Tomatoes? Sometimes caused by stress as well
It might be throat ulcer or canker sore. I am not a doctor but I did stay at a holiday inn express. My brother and I had them as kids. Look similar, burns. Really needed to watch acidic foods. Not so much now as I out grew it.
http://www.webmd.com/skin-problems-a...topic-overview
30 minutes at a dr and they will tell you
Gl