6. What are the widespread diseases which can cause pigmentation of the buccal mucosa? Posted on April 16, 2023 Correct answer: Addison’s disease; Peutz–Jeghers will cause pigmented spots. Post navigation Previous Post5. What happens to the tongue in the case of hypoglossal nerve palsy? Next Post7. By looking in the mouth, what information can be given about the general condition and habits of the patient?