Common Causes of Dark Spots on Gums Smilepoint Dental Beaumont TX What Causes Black Patches Inside the Mouth and How to Address Them? Your Health Magazine Figure 2 from Amalgam Tattoo Mimicking Mucosal Melanoma: A Diagnostic Dilemma Revisited Semantic Scholar ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production Multifocal pigmentation of the oral mucosa The Journal of the American Dental Association Black spot inside cheek: Pictures, causes, treatment, and more