<unk>  is a diffuse white patch on the hard palate, usually caused by tobacco smoking, usually pipe or cigar smoking. It is painless, and it is caused by a response of the palatal oral mucosa to chronic heat. A more pronounced appearance can occur with reverse smoking, sometimes distinguished from<unk>  by the term reverse smoker's<unk> . While<unk>  that is caused by heat is not a premalignant condition (i.e. it does not carry an increased risk of transformation to oral cancer), the condition that is caused by reverse smoking is premalignant.
Stomatitis nicotina
Bradyphrenia
Tinea faciei
Tinea imbricata
Visceral larva migrans
Allochiria
Acheiria
Tinea capitis