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Purging Disorder vs. Bulimia
Purging Disorder is easy to mistake for bulimia because both involve regular purging — but one key ingredient of bulimia is missing.
The core distinction
Bulimia involves purging after binge eating episodes. Purging Disorder involves regular purging without the binge — someone purges after eating a normal or even small amount of food, in an attempt to control weight or shape.
Key differences
| Factor | Purging Disorder | Bulimia |
|---|---|---|
| What precedes the purge | A typical-sized or small meal | A binge episode |
| Diagnostic category | Falls under OSFED | Own DSM-5 listing |
| Medical risk | Comparable to bulimia’s | Electrolyte imbalance, cardiac risk, dental/esophageal damage |
Why they’re confused
The purging behavior itself looks identical from the outside; the difference is entirely about what happened right before it, which isn’t something you can observe.
When to seek help
Regular purging of any kind — with or without a preceding binge — warrants medical attention because of the physical risk involved, independent of which diagnosis it turns out to be.
This comparison is for educational purposes only and is not a diagnostic tool. Only a licensed clinician can diagnose an eating disorder.