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 Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer Gray melanotic macule on the palate in a 50 year old female Download Scientific Diagram What Caused These Multiple Hyperpigmented Macules of the Mouth? Pigmented Lesions of the Oral Mucosa Springer Nature Link