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In professional terms, tooth marks around the edges of the tongue is called a scalloped tongue. This is one sign that a person might be clenching and grinding their teeth, especially at night during sleep. Ask your dentist if there are other signs that you might be doing this.
Causes[edit] The cause is unknown. Geographic tongue does not usually cause any symptoms, and in those cases where there are symptoms, an oral parafunctional habit may be a contributory factor. Persons with parafunctional habits related to the tongue may show scalloping on the sides of the tongue (crenated tongue).