Have you ever wondered the reasons why some people purge? Purging behavior occurs on a spectrum, from people who do it only occasionally to people who do it often as part of an eating disorder.
The reasons people purge vary. Purging is sometimes a normalized social behavior. Some people purge due to physical discomfort from having a full stomach. Most attempt to use purging in an attempt to lose and/or control weight. Others find great physical and emotional relief in purging. When we understand why people purge, we can better help them find other ways to manage the discomfort driving the purge.
In this article we will review the four major reasons for purge behavior:
- Socialied purges: socially accepted purge behaviors that are openly discussed in society
- Bonding purges: teens and young adults may engage in bonding with friends by purging together
- Weight-loss purges: purging can seem like an easy way to lose weight without cutting down on food eaten
- Soothing purges: some people experience a positive soothing quality when purging
Types of purging behavior
Purging behavior includes:
- Self-induced vomiting
- Laxatives, diuretics and weight-loss medication
- Compensatory exercise
The majority of serious purging is based on the idea of reducing calories in the body based on the mistaken assumption that weight is directly based on calories digested. But it is important to understand that purging can serve a variety of purposes in our lives.
Purging behavior is often not as “abhorrent” or “disgusting” as it may seem. Most of the reasons for a purge make a sort of sense – they can serve a very real purpose in a person’s life. It is only when a person can understand the behavior that they are able to replace it with more adaptive ones.
Purging and eating disorders
Purging behavior is not limited to Bulimia Nervosa. It can also be seen with Anorexia Nervosa, Binge Eating Disorder, OSFED, and many subclinical eating disorders. Purging behavior can even be a stand-alone disorder.
It’s important to know that purging to control weight rarely “works.” The body is very efficient and can adjust to purging behavior in order to maintain weight status. Thus, many people who attempt to use purging to reduce weight find themselves frustrated because it doesn’t “work.”
Purging of all types, at any level, has been correlated with other risky behaviors. These include smoking, binge drinking, and drug use.  One recent finding showed that 13% of North American girls reported purging behaviors in mid-adolescence. 
Reasons we purge
These four reasons for using purge behavior may help you understand why it happens and some alternative coping mechanisms. It is our belief that purging, like all eating disorder behaviors, should be approached with understanding and compassion. This will result in better success in supporting recovery.
1. Socialized purges
Socialized purges are socially accepted purge behaviors that are openly discussed in society. The most common example takes place at large meals like Thanksgiving. Many people will talk about engaging in vigorous exercise before or after Thanksgiving dinner. They attempt to “work off” the calories from the meal.
Many family tables involve one or more parents mentioning that they will take a little less food. They say they didn’t exercise that day, and need to compensate. Or they may take a little more because they “were good.” They say they can eat more because they exercised or restricted food earlier in the day. This is called “compensatory behavior” and is a form of calculation in which food is “earned” with the appropriate behavior.
People regularly say things like:
- I’m going to have to put in some extra miles tomorrow after all these cookies
- I shouldn’t be eating this, but I’ll go to the gym to make up for it
- I skipped breakfast so that I could indulge tonight
- I’ll have to skip breakfast tomorrow to make up for this meal
- I can eat this cupcake because I burned 500 calories on the treadmill today
- I’m off to burn 500 calories in spinning class so that I can enjoy dessert tonight.
This is socially normalized behavior, but it is also eating disorder behavior. Parents should be aware that when socialized purges are normalized, we open the door to eating disorders.
We should eliminate socialized purges and any form of food or exercise compensatory behavior from our children’s lives. Food should never be “earned” or “worked off.” It should be enjoyed and appreciated as a critical element of life.
2. Bonding purges
It is not uncommon for teens and young adults to engage in bonding with friends by purging. This may involve group vomiting, drinking laxative teas, skipping meals, and exercising after eating a meal.
Friendships are often the places where people first engage in purging behaviors. They become normalized and attractive as a result. Through friendships, people feel a sense of critical belonging and understanding. When purging becomes a part of a friendship it can become a “sticky” behavior that is done together and can even spread to other friendships or done alone.
The most common social example of this is sororities. Large groups of sorority sisters will share purge behaviors and “secrets” about how to purge. Many will move on from these purge behaviors once they leave the social circle. But the baseline behavior is already normalized and reinforced. As a result, the person is vulnerable to future mental health conditions including depression and anxiety. 
Additionally, even “mild” purging behavior is correlated with high-risk behaviors including binge drinking, smoking, and drug use. 
If a person is engaging in bonding purges, they may not have a diagnosable eating disorder. But their purging behavior is still a significant concern. A percentage of people who engage in bonding purges may develop additional eating disorder symptoms and behaviors.
Early intervention can make a significant impact. We encourage parents to talk to kids about purging and seek professional support.
3. Weight-loss purges
We live in a society that has normalized and encourages dieting. But dieting is linked to higher lifetime body weight and significant health complications. [5, 6]
Purge behavior can seem like an easy way to lose weight without cutting down on food eaten. However, purging, like all forms of weight control, does not benefit health and carries significant complications.
The desire to achieve a lower body weight is pervasive. It is especially pernicious among teenage girls, the population most vulnerable to developing eating disorders. Dieting is the most powerful predictor of an eating disorder. 
Diet culture as a reason we purge
Our diet culture promotes low body weight at any cost. There are countless diet programs available to support people who want to pursue intentional weight loss. But our bodies are finely tuned to maintain their own healthy body weight. This is regardless of what we would like that weight to be. Any restriction causes a healthy and intense hunger response. This often results in binge eating or eating beyond the point of physical comfort.
Often when a person is binge eating, they are driven by extreme bodily needs. They enter a state of emotional disconnection. It’s as if the body turns the mind off so that it can take over and get what it needs.
While binge eating, a person is typically not aware of how much they are eating. Nor are they able to stop themselves. Once a person has “succumbed” to their natural biology and eaten food in response to their hunger, they may turn to purge behaviors to compensate. This can relieve both the physical discomfort and the emotional distress of “over” eating.
Even people who maintain very restricted diets and eat very little food may engage in purging. They believe it is necessary to maintain their diet and/or low weight. In this way, purging can become a part of maintaining a diet. It may occur even without binge-eating episodes.
For example, someone who is on a calorie-restricted diet may eat very little but still purge. They want to “get rid” of any calories that they believe put them over their daily goal. Someone who is on a carb-restricted diet may attempt to purge after a carb-laden meal. But they will not necessarily purge after a no-carb meal.
Purging for weight loss
Purging for weight loss can seem like a “smart” way to manage the pressures of maintaining low body weight. It appears to solve problems for the strict dieter who occasionally or often goes beyond the boundaries of their diet.
Purge behaviors can become dangerously compulsive. They often co-exist with Binge Eating Disorder, Anorexia Nervosa, and OSFED, or become chronic in the form of Bulimia Nervosa.
When a person is engaging in purge behavior they need intensive care. Ideally, they need providers who understand the dangers of diet culture and work from a non-diet perspective.
Providers should not be weight-conscious or promise that a person will not gain weight. They should definitely not promise weight loss. These approaches are outdated and often deepen the underlying reasons for purge behavior.
4. Soothing purges
This may surprise you. Many people who develop chronic purging behaviors experience a positive soothing quality to the action of purging. Eating disorders, especially Bulimia Nervosa, can be described as Maladaptive Coping Mechanisms, which are subconscious mechanisms to soothe anxious feelings.
Bulimia has been linked to underlying problems with impulsivity. This can be defined as urgency, sensation seeking, lack of premeditation, and lack of perseverance. 
Lacking self-soothing tools
People who develop Bulimia tend to lack the ability to self-soothe. To compensate, they seek external behaviors such as purging, substance use, and self-harm. These behaviors are sought on a subconscious and incredibly urgent basis. This is why purging behavior can sometimes be described as “addictive,” since it engages a response similar to addictive substances.
People who have Bulimia are more likely to engage in self-harm behavior. They harm at rates between 25 and 75 percent reported in various studies.  Just like Bulimia, self-harm may seem like a strange way to soothe oneself. But they are both surprisingly consistent as coping behaviors.
Like Bulimia, self-harm is a powerful form of non-verbal communication. It is a very valid call for help when the person suffering lacks adaptive methods of seeking support.
Treatment for purging behavior
The reasons for purge behavior are different for everyone. But all people who purge will benefit from professional support so they can build adaptive coping mechanisms. These adaptive methods will help them process pain, anxiety, and fear.
They offer new ways of emotional soothing that don’t involve using external agents like food, alcohol, and drugs. Nor do they remove anything from their body with behaviors like purging and bleeding).
Treatment for soothing purges should come from a place of compassion and acceptance. A person in recovery should feel free to fully explore the urges that drive their behavior.
Therapists tell us that the goal is to help the person understand what they are seeking with purging. Only then can they begin the process of replacing their eating disorder behavior with more adaptive coping methods. The urge surfing method can help someone mindfully manage urges and replace them with other coping behaviors.
Find a non-diet, HAES-oriented professional to help solve the reasons you or your loved one purges.
Ginny Jones is on a mission to empower parents to raise kids who are free from eating disorders. She’s the founder of More-Love.org and a Parent Coach who helps parents navigate eating disorder recovery.
See Our Parent’s Guide To The Different Eating Disorder Behaviors
 Micali, et al, The incidence of eating disorders in the uk in 2000-2009, BMJ, 2013
 Field, et al, Prospective association of common eating disorders and adverse outcomes, Pediatrics, 2012
 Solmi, et al, Prevalence of purging at age 16 and associations with negative outcomes among girls in three community-based cohorts, Journal of Child Psychology and Psychiatry, 2015
 Neumark-Sztainer, et al, Dieting and Disordered Eating Behaviors from Adolescence to Young Adulthood: Findings from a 10-Year Longitudinal Study, Journal of the American Dietetic Association, 2011
 Mann, Secrets From the Eating Lab: The Science of Weight Loss, the Myth of Willpower, and Why You Should Never Diet Again
 Strohacker K, Carpenter, K, McFarlin B, Consequences of Weight Cycling: An Increase in Disease Risk?, International Journal of Exercise Science, 2009
 GC Patton, R Selzer, et al, Onset of adolescent eating disorders: population cohort study over 3 years, BMJ, 1999
 Anestis, et al, The role of urgency in maladaptive behaviors, Behaviour Research and Therapy, 2007
 Marilee Strong, A Bright Red Scream: Self-Mutilation and the Language of Pain, 1998