Treatment of labial melanotic macules on the lip. These are benign spots that appear on the lips for no apparent reason. The causes are mostly genetic, but similar spots can appear in smokers, after Congenital Melanotic Macule of the Tongue: Report of Two Cases and Literature Review Head and Neck Pathology Springer Nature Link Mole Inside the Mouth: 5 Alarming Causes Liv Hospital Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com Diagnosis of pigmented lesions of oral cavity PPTX Melanotan II (Tan Jabs): Why They're Not Worth The Risk