Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer DermDx: Brown Macule on Lip Dermatology Advisor NOW Sports L Carnitine (Carnipure Liquid) AvivaHealth.com 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 Causes Black Patches Inside the Mouth and How to Address Them? Your Health Magazine