Pigmented Lesions of the Oral Mucosa Springer Nature Link Pigmented Lesion on the Hard Palate AFP 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 Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com a Melanotic macule at the wetdry line of the lower lip. b Melanotic Download Scientific Diagram Melanotic Macules of Oral Mucosa DoveMed