I drink scalding hot coffee even I have gastric and stomach burning issue. But I love to sip super-hot coffee. Is it a bad addiction to sip hot coffee? Does it harmful for health?
Burning your mouth is obviously the biggest risk when drinking piping-hot coffee. Burning your tongue can lead to destroying taste buds and if you burn it badly enough, you could get an infection on that burn. Further, if I remember correctly, drinking very hot liquids often can contribute to higher levels of mouth cancer.
HERE is some research I found through a quick google.