Question

Many times you cannot eat hot food due to inflammation / ulceration in mouth.

Answer 1

mouth has saliva which helps in the digestion of food but in some cases like ulcers , the hot food might make the injury active and hurt it so we become unable to eat hot food.

Answer 2

Many times we cannot eat hod food due to inflammation/ulceration in mouth because those ulcers or inflamed parts are like open wounds and are more sensitive to change in temperature.