What is a lifelong complication of bulimia nervosa? Tooth erosion? Tears?

answered:

Disappearing teeth

Tooth
The stomach acids come up the throat and hit the back of the upper front teeth and then fall off the tongue and hit the top of the lower back teeth. If you don't look closely at hose areas you may not notice it before it is too late. You may need to see a Psychiatrist or therapist to overcome the disorder.
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answered:

Death

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Bulimia Nervosa has up to a 25% mortality rate if untreated. Dental enamel erosion is common. There are almost too many complications to mention, besides just the consequences of malnutrition. Losing stomach acid can cause a disruption in pH balance, electrolyte depletion, cardiac arrhythmias, hemorrhaging from a Mallory Weiss tear and bleeding to death.
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answered:

Lifelong Bulimia

Bulimia
complications can be very serious. You are correct about permanent decay of the tooth enamel (which is often how it is first diagnosed by a dentist). Other complications include the inability to keep food down, and even cancer of the esophogus from continued contact with the acids from the stomach.
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Acid Dissolves Teeth

Teeth
The acid from throwing up will dissolve the enamel coating & dentin supporting structure of the teeth. This can be quite severe and a difficult dental problem. I have even seen teeth dissolved so much that the amalgam fillings stand up out of the remaining teeth. See a physician to treat the bulimia and a dentist to manage the dental problems.
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Psychological needs

Bulimia
The complications of the disorder are as you noted: Erosion of the enamel and dentin which put the teeth at risk. More importantly are the psycho-social reasons people suffer from the disorder. Counseling is the best long term preventive measure, as mental health is in the long run more important than dental health.
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