Amy’s Story: Once again, Amy is on a liquid diet. “I’m going to stick with it,” she tells herself. “I won’t give in to the cravings this time.” But as the day goes on, Amy’s willpower weakens.

After 45 minutes of bingeing, Amy is so stuffed that her stomach feels like it’s going to burst. She’s disgusted with herself and terrified by the thousands of calories she’s consumed.
She runs to the bathroom to throw up. Afterwards, she steps on the scale to make sure she hasn’t gained any weight. She vows to start her diet again tomorrow. But tomorrow, it will be different.
Bulimia nervosa is an eating disorder characterized by frequent episodes of binge eating, followed by frantic efforts to avoid gaining weight.
When you’re struggling with bulimia, life is a constant battle between the desire to lose weight or stay fit and the overwhelming compulsion to binge eat.
You don’t want to binge—you know you’ll feel guilty and ashamed afterwards—but time comes and you give in again. During an average binge, you may consume from 3,000 to 5,000 calories in one short hour.
After it ends, panic sets in and you turn to drastic measures to “undo” the binge, such as taking ex-lax, inducing vomiting, or going for a ten-mile run. And all the while, you feel increasingly out of control.
It’s important to note that bulimia doesn’t necessarily involve purging—physically eliminating the food from your body by throwing up or using laxatives, enemas, or diuretics. If you make up for your binges by fasting, exercising to excess, or going on crash diets, this is also known as bulimia.
(Source: www.helpguide.org)