Thanks for your question. I agree with the online resource you reference - you really should seek medical help by visiting your nearest emergency room for an evaluation. The amount of blood you describe is usually caused by Mallory-Weiss tears, which are small rips in the lining of your esophagus. While they typically heal over themselves, they can progress to full esophageal rupture, something called Boerhaave syndrome, which is extremely dangerous and can be fatal. While it is possible that given the amount of blood you are seeing nothing at all will happen, in reality if you are purging enough to cause tears in the lining of your esophagus, your bulimia has become a problem outside of your ability to control, placing you at real risk of serious medical complications. You should seek help as soon as possible to address this problem and protect your health. I hope this helps. Dr. Sheppe