3. Poor Dental Hygiene

Regularly brushing the teeth, gums, and tongue is an essential daily ritual. Poor dental hygiene can cause a yellow tongue; failing to remove bacteria and food particles that are trapped by the papillae will cause staining to occur as they break down. Luckily, when this is the primary cause of discoloration, improving hygiene practices should be an easy fix. The American Dental Association recommends brushing twice a day.

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