Generally the red and white lesions are benign and a large proportion of the normal population has been affected by it. The most common precancerous condition which comes under these lesions classification is Leukoplakia. A proper management of this condition is required to avoid its future complication.
Erythematous lesions of the oral mucosa are common and may result from a variety of tissue alterations, including inflammation, erythrocyte extravasation, and atrophy or reduced keratinization of the surface epithelium.