This condition is an eating disorder wherein those who are affected by it cannot stick to a proper and nutritional diet and eating pattern. These people eat so much in one meal and then stave off eating for the rest of the day. This is called binging. They feel guilty and out of control so they panic and reprimand themselves by starving, over-exercising, taking laxatives and makes themselves feel sick.
This leads to a lot of physical damage like having tooth decay, intestinal damage, constipation, and even kidney and heart diseases. A person has bulimia nervosa if they avoid eating with company and if they go to the lavatory once they finish a meal.