Nevus (or naevus, nevi: Latin for “birthmark”) is the medical term for sharply circumscribed and sometimes chronic lesions of the mucosa or skin. With these lesions are commonly named birthmarks or beauty marks.
Nevi are benign by definition. There are however about 25% of malignant melanomas (a skin cancer) that may develop from pre-existing nevi. Please make it routine and have a proper exam yearly with your local Palm Beach Eye Center.