a Melanotic macule at the wetdry line of the lower lip. b Melanotic Download Scientific Diagram Oral melanotic macule Stock Image C067 2477 Science Photo Library 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. What Caused These Multiple Hyperpigmented Macules of the Mouth? Pigmented Lesions Springer Nature Link