An oral melanotic macule is a harmless dark spot found on the lip, most often the lower lip, or inside the mouth, either on the gums, inside the cheek, or on the roof of the mouth. An oral melanotic Oral Mucosal Melanosis IntechOpen Oral Melanotic Macule Is It Dangerous KERUSSO Smoker? These brown patches might NOT be dangerous Most dental students confuse this condition Smoker's melanosis is a common oral finding caused by increased melanin production due to tobacco exposure