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If you have anorexia nervosa or bulimia nervosa, you may experience some problems with your teeth. You may have symptoms such as sensitive teeth, toothache, or perhaps your teeth have changed colour. Most of these problems are due to acid erosion of the surface of the teeth. This acid can come from two sources, acidic foods or drinks, and stomach acid as a result of vomiting.
Stomach acid washing over the teeth dissolves the enamel layer of the tooth. This may lead to the pulp and nerve endings becoming exposed and the teeth may then have to be crowned or coated. Unfortunately much of the repair work undertaken to preserve the teeth of a person with an eating disorder will be ineffective unless they stop using self-induced vomiting as a method of weight control.
Constant drinking or sipping low calorie ‘fizzy’ drinks, ‘sport/energy’ drinks or fruit based drinks can also have similar effects because of the acid they contain.
It is important not to brush teeth after vomiting as this can make the problem worse. Using a fluoride mouthwash and then waiting several hours before brushing or eating acidic foods will reduce, but not prevent problems.
