Bulimia nervosa is an eating disorder in which a person has regular episodes of eating a very large amount of food during which the person feels a loss of control over eating. The person then uses different ways, such as vomiting or laxatives, to prevent weight gain. Many people with bulimia also have anorexia.
Causes:
Many women than men have bulimia. The disorder is most common in teenage girls and young women. The person usually knows that her eating pattern is abnormal. She may feel fear or guilt with the binge purge episodes.
The exact cause of bulimia is unknown genetic, family, psychological, society or cultural factors may play a role. Bulimia is likely due to more than one factor.
Symptoms:

The person eats large amounts of high calorie foods, usually in secret. The person feels a lack of control over the eating which cause weight gain. People with bulimia are often at a normal weight, but they may see themselves as being overweight. The person’s weight is often normal other people may not notice this eating order. Symptoms that people can see include:
• Spending a lot of time exercising.
• Suddenly eating large amount of food or buying large amount of food that disappear right away.
• Regularly going to the bathroom right after meals
• Throwing away package of laxatives, diet pills, emetics ( drugs that cause vomiting)