Brown spots, especially on the lips, can be alarming to some. In some instances it can indicate rare oral mucosal melanoma, however in this case it was a non cancerous labial melanotic macule. Oral melanotic macule in a leukoderma patient: a comprehensive case report Mcula melantica oral en un paciente con leucoderm What Caused These Multiple Hyperpigmented Macules of the Mouth? Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor 05 May 03 Eng Congenital Melanotic Macule of the Tongue: Report of Two Cases and Literature Review Head and Neck Pathology Springer Nature Link