Bulimia. Upper front teeth that are paper thin, with the enamel almost completely worn away, and teeth that hurt. Distinguishable from acid reflux because different teeth are affected.

• 暴食症。上端前齿过薄，牙釉质几乎没有，牙齿有损伤。很容易和胃酸逆流区别，因为所腐蚀的牙齿不同。