What is a key characteristic of nicotinic stomatitis?

Nicotinic stomatitis is primarily characterized by white, keratotic lesions that appear on the roof of the mouth, typically resulting from the chronic irritation of tobacco smoking or chewing. The lesions are the result of keratinization due to the heat and chemical exposure from the tobacco products. This condition can often present with a leathery texture and an altered appearance of the mucosa, distinguishing it from other oral lesions that might exhibit redness or ulcerations.

While characteristics like red, inflamed mucosa may be seen in other conditions affecting the oral cavity, they are not defining aspects of nicotinic stomatitis. Similarly, painful ulcerations are not typical of this condition; instead, they might indicate other oral pathologies. Bleeding gums are associated with periodontal disease, which is unrelated to the keratotic changes seen with nicotinic stomatitis. The specific presentation of white, keratotic lesions makes it the hallmark feature of this condition.