Orale melanosis An oral melanotic macule is a harmless dark spot found on the lip, most often the lower lip, or inside the mouth, either on the gums, inside the cheek, or on the roof of the mouth. An oral melanotic Dark Spot on Lip: Harmless or Serious? What to Check First La Bouche Parfaite What Caused These Multiple Hyperpigmented Macules of the Mouth? Mara Ever wondered what those little brown spots are that are often found on the lip? Many refer to them as a freckle but the medical term is melanotic macules.