the reasons we purge

Four reasons we purge

Have you ever wondered the reasons we we purge? Purging behavior occurs on a spectrum, from people who do it only occasionally to people who do it compulsively.

The reasons we purge vary. Purging may be a social behavior. Some people purge because they feel “too full.” Others find great physical and emotional relief in purging. When we understand why our kids purge, we can better help them stop.

Types of purging behavior

Purging behavior includes the use of self-induced vomiting, the use of laxatives, diuretics and weight-loss medication, and exercise. The majority of purging begins with a simple goal of controlling weight. But it is important to understand that purging can serve a variety of purposes in our lives.

We are putting this information forward to help parents better understand the reasons we purge. Purging behavior is often not as “abhorrent” or “disgusting” as it may seem. Most of the time purging serves a very real purpose in a person’s life. It is only when we understand the behavior that we are able to replace it with more adaptive ones.

Purging and eating disorders

It’s important to know that 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.

Purging of all types, at any level, has been correlated with other risky behaviors. These include smoking, binge drinking, and drug use. [3] One recent finding showed that 13% of North American girls reported purging behaviors in mid-adolescence. [4]

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Reasons we purge

Hopefully, these descriptions will help you understand some of the reasons we purge. It is our belief that parents should approach a child who purges with understanding and compassion. This will result in better success in supporting the child’s recovery from an eating disorder.

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 we normalize socialized purges, 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 we first engage in purging behaviors. They become normalized and attractive as a result. Through our friendships, we feel a sense of critical belonging and understanding. When purging becomes a part of a friendship it can become a “sticky” behavior that we do together and even spread to other friendships or done alone.

The most common social example of this is sororities. Large groups of girls 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. [2]

Additionally, even “mild” purging behavior is correlated with high-risk behaviors including binge drinking, smoking, and drug use. [3]

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]

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. [7]

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, we are typically not aware of how much we are eating. Nor are we able to stop ourselves. 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 a 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 can co-exist with Binge Eating Disorder, Anorexia Nervosa or 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 we purge.

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4. Soothing purges

This may surprise you. Many 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, sensations seeking, lack of premeditation, and lack of perseverance. [8]

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. [9] Just like Bulimia, self-harm may seem like a bizarre 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 we purge 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 putting anything in the body (e.g. food, alcohol, drugs). Nor do they remove anything from their body (e.g. purging, bleeding).

Treatment approach

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 purge behavior with more adaptive coping methods.

Find a non-diet, HAES-oriented professional to help solve the reasons you or your loved one purges.



[1] Micali, et al, The incidence of eating disorders in the uk in 2000-2009, BMJ, 2013

[2] Field, et al, Prospective association of common eating disorders and adverse outcomes, Pediatrics, 2012

[3] 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

[4] 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

[5] Mann, Secrets From the Eating Lab: The Science of Weight Loss, the Myth of Willpower, and Why You Should Never Diet Again

[6] Strohacker K, Carpenter, K, McFarlin B, Consequences of Weight Cycling: An Increase in Disease Risk?, International Journal of Exercise Science, 2009

[7] GC Patton, R Selzer, et al, Onset of adolescent eating disorders: population cohort study over 3 years, BMJ, 1999

[8] Anestis, et al, The role of urgency in maladaptive behaviors, Behaviour Research and Therapy, 2007

[9] Marilee Strong, A Bright Red Scream: Self-Mutilation and the Language of Pain, 1998

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