You know how when you drink something freezingly cold you experience a brainfreeze, what about when you eat something extremely hot and you feel the burn in your esophagus. What is that called?
In America , I think we would call it
- burning one's throat
I believe that Americans do not commonly/colloquially call it the esophagus; that is more of a medical term.
Note that this is different from
- "having a burning [feeling]" in one's throat
which is usually caused by acid reflux (formerly known as heartburn), not by heat.