Binge eating and purging behavior, as described in your question, is characteristic of an eating disorder known as bulimia nervosa. Bulimia nervosa is characterized by recurrent episodes of binge eating, followed by attempts to compensate for the binge by purging (through vomiting or the use of laxatives or other medications), fasting, or excessive exercise. This behavior can be harmful to a person's physical and mental health and can lead to a range of complications, including malnutrition, electrolyte imbalances, and damage to the digestive system. If you or someone you know is experiencing bulimia nervosa or other eating disorder behaviors, it is important to seek help from a healthcare professional or mental health professional as soon as possible.