Does allergic stomatitis cause pigmentation of oral mucosa? The Journal of Prosthetic Dentistry Black Spot Inside Cheek: Possible Causes and When to See a Doctor How to Remove Black Spots Inside Mouth: Best Guide Liv Hospital 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