Eating disorders cause more than psychological harm. The binge-purge cycle of bulimia or the self-starvation patterns of anorexia can also injure the physical body, especially the mouth.
For example, nine in ten people with bulimia will experience tooth enamel erosion from stomach acid entering the mouth from induced vomiting. Although purging is less frequent with anorexic patients, one in five will also develop erosion.
An eating disorder isn't the only reason for enamel erosion: you can have high acid levels from over-consuming sodas, energy drinks or certain foods, or not properly brushing and flossing every day. But erosion related to an eating disorder does produce a distinct pattern in the teeth. When a person vomits, the tongue moves forward and presses against the bottom teeth, which somewhat shields them from acid contact. This can create less erosion in the lower front teeth than in others.
Eating disorders can cause other oral effects. Stomach acid contact can eventually burn and damage the mouth's soft tissues. The salivary glands may become enlarged and cause puffiness along the sides of the face. The use of fingers or other objects to induce gagging can injure and redden the back of the throat, the tongue and other soft tissues.
It's important to stop or at least slow the damage as soon as possible. To do so requires both a short– and long-term strategy. In the short-term, we want to neutralize mouth acid as soon as possible after it enters the mouth, especially after purging. Rather than brushing, it's better to rinse out the mouth with water or with a little added baking soda to neutralize the acid. This will at least help reduce the potential damage to enamel.
In the long-term, though, we need to address the disorder itself for the sake of both the person's overall well-being and their oral health. You can speak with us or your family physician about options for counseling and therapy to overcome an eating disorder. You may also find it helpful to visit the website for the National Eating Disorders Association (nationaleatingdisorders.org) for information and a referral network.
If you would like more information on how eating disorders can affect health, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “Bulimia, Anorexia & Oral Health.”