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. Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com Oral pigmented lesions: a pragmatic approach to diagnosis and management Faculty Dental Journal Oral Melanotic Macule: Symptoms and Treatment Skinsight