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. Dental Update Malignant oral melanoma: how to spot it and how it is managed Dental Update Morphology of melanocytic lesions in situ Scientific Reports Oral Melanotic Macule: Symptoms and Treatment Skinsight Melanocytic Lesions A Guide to Clinical Differential Diagnosis of Oral Mucosal Lesions Continuing Education Course dentalcare.com