When does eating disorder cause ruptured esophagus?

Eating DO: Inflammation of esophagus can occur with frequent self-induced vomiting or chronic cases but rupture is rare.

Pressure: More specifically, the particular type of eating disorder called bulimia is associated with a tear in the esophagus due the pressure from inducing vomiting. This can cause something called a mallory-weiss tear and can be fatal.

Acid: Purging (self-induced vomiting), characteristic of bulimia, causes stomach acid to deposit in the esophagus. This would erode and eventually rupture the esophagus.