Oral lichen planus usually has a somewhat higher cancer rate compared to oral leukoplakia. Oral leukoplakia is a precancerous condition that has a higher cancer rate of between 3% and 5%. Oral lichen planus has a relatively low rate of cancer and is precancerous. If oral leukoplakia is present, surgical excision is usually considered. Conservative treatment may be considered if the area is less than 2 centimeters and the epithelium is not abnormally hyperplastic or mildly hyperplastic. If oral leukoplakia ulcers do not heal over time, or if there are red and red-white spots within the ulcers and the ulcers are hard in texture, malignant transformation may occur. Biopsy should be performed as soon as possible to clarify the diagnosis. Because both oral lichen planus and oral leukoplakia may be cancerous, it is recommended that both patients with oral lichen planus and oral leukoplakia should go to the hospital in time and take treatment actively.