Common Causes of Dark Spots on Gums Smilepoint Dental Beaumont TX Melanotic Macules, Naevi, and Melanoma Springer Nature Link 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 Differential diagnosis of an oral mucosal pigmented lesion: a case of essential melanosis Pigmented Lesions Springer Nature Link Oral pigmentation in children: a diagnostic challenge Archives of Disease in Childhood