Eating disorders: Definition, symptoms, causes, types

Are you or someone you care about struggling with eating habits that seem out of control? Eating disorders, often misunderstood as mere food issues, are complex conditions intertwining psychological, physical, and social elements.

This blog aims to clarify these disorders by offering detailed insights into their definition, symptoms, causes, and types.

You’ll gain a clearer perspective on these conditions with a blend of expert knowledge and compassionate understanding. This understanding is crucial for those directly affected, their loved ones, and healthcare providers.  

Let’s explore this significant topic together, empowering you with information and guidance.

What are eating disorders?

Eating disorders are complex conditions that extend far beyond issues related to food and eating habits. 

Individuals with eating disorders display persistent and severe disturbances in their eating behaviors. They also experience distressing thoughts and emotions related to body image and weight. These disorders are not merely about food choices but are severe mental health conditions.

Statistics reveal the alarming prevalence of these conditions, highlighting the urgency for awareness and intervention. 

One in eight youngsters may have at least one eating disorder by the age of twenty, demonstrating the early onset of these conditions. 

In the United States alone, approximately 5 million individuals are affected by eating disorders annually. Although eating disorders can affect people of all genders and ages, they are most frequently reported in adolescents and young women between the ages of 12 and 35 [1]. 

Specifically, the rates of anorexia nervosa and bulimia nervosa among adolescent females are about 0.3% and 1%, respectively. 

Notably, while young women are more commonly affected by most eating disorders, binge eating disorder presents a unique demographic pattern, being more prevalent in men and older individuals [2].

It is a misconception that eating disorders only impact a certain demographic; they can affect individuals of all ages, racial and ethnic backgrounds, body weights, and genders.

The psychological aspect of eating disorders involves a preoccupation with weight, body shape, and food, often coupled with extreme anxiety about eating or the consequences of eating certain foods. 

Physically, these disorders can lead to severe health complications, including nutritional deficiencies, heart and gastrointestinal problems, and, at times, life-threatening conditions. 

Socially, factors such as cultural norms, family dynamics, and media influences play a significant role in the development and perpetuation of these disorders.

Addressing these disorders goes beyond managing dietary habits and involves treating the underlying psychological issues and the broader social context.

What are the common symptoms of eating disorders?
Photograph: maksymiv/Envato

What are the common symptoms of eating disorders?

Signs and symptoms of eating disorders are complex and can manifest differently in each individual. They are not confined to a specific age group or gender and can affect anyone. 

Physical symptoms

These symptoms are often the most visible indicators of an eating disorder. They include [3]:

  • Significant weight fluctuations, either loss or gain.
  • Signs of malnutrition, like hair loss, brittle nails, and dry skin.
  • In more severe cases, physical symptoms can escalate to major health complications, including heart problems and gastrointestinal issues.

Psychological symptoms

The psychological aspect of eating disorders is characterized by an unhealthy relationship with food and body image, often manifesting as:

  • An obsession with food, dieting, and calorie counting.
  • Distorted body image and intense fear of gaining weight, even in individuals who may be underweight.
  • Feelings of guilt, shame, or disgust after eating are common in disorders like bulimia nervosa and binge-eating disorder.

Behavioral symptoms

Behavioral signs often indicate how individuals interact with food and their body image. These symptoms include [4]:

Understanding these signs is the first step in seeking or offering help. Early intervention can provide more effective treatment and a better chance of recovery.

If you or someone you know is experiencing symptoms of an eating disorder, it’s important to seek professional help immediately.

What causes eating disorders?

Since eating disorders are multifaceted conditions, their causes are rooted in a combination of biological, psychological, and social factors.

Biological factors

The biological underpinnings of eating disorders include genetic predisposition and neurobiological elements. 

Genetics plays a crucial role, as individuals may inherit genes that increase their susceptibility to these disorders. 

Furthermore, alterations in brain chemistry and function can contribute to the development and maintenance of eating disorders [5].

Psychological factors

Psychological factors are significant contributors to the onset of eating disorders. Mental health issues like anxiety, depression, and obsessive-compulsive disorder are often intertwined with these conditions [5]. 

Additionally, eating disorders can emerge following stressful or traumatic life events, such as the loss of a loved one, a sexual assault, or starting a new job. 

These events can trigger overwhelming emotions, leading individuals to seek a sense of control through food intake and weight regulation.

Social and environmental factors

The social and cultural environment shapes attitudes toward body image, weight, and eating behaviors. 

Western cultures strongly emphasize thinness and beauty, which can influence self-worth and body satisfaction. 

The pervasiveness of media portraying idealized body types leads to constant comparison and can significantly impact self-esteem and body satisfaction. 

Family dynamics, peer pressure, and societal standards are also influential, contributing to the development of eating disorders [5].

Types of eating disorders

Anorexia nervosa

This disorder is characterized by a relentless pursuit of thinness, intense fear of gaining weight, and a significant distortion in how one’s body weight or shape is experienced [6]. 

Individuals with anorexia typically restrict their food intake to a dangerous level, often leading to a significantly low body weight.

Health implications: This disorder can lead to severe health problems like osteoporosis, infertility, heart issues, and, in extreme cases, death due to starvation or suicide.

Bulimia nervosa

This eating disorder involves periods of binge eating followed by compensatory behaviors such as vomiting, excessive use of laxatives, fasting, or excessive exercise [7]. Individuals with bulimia are overly concerned with body shape and weight.

Health implications: The cycle of binging and purging can cause gastrointestinal issues, severe dehydration, electrolyte imbalances, and dental problems due to exposure to stomach acid.

Binge eating disorder

Binge eating disorder is marked by regular episodes of eating large quantities of food rapidly to the point of discomfort, often followed by feelings of guilt or shame [8]. Unlike bulimia, these episodes are not followed by purging, excessive exercise, or fasting.

Health implications: This disorder often leads to obesity and related conditions like heart disease, stroke, and type 2 diabetes.

Avoidant/Restrictive Food Intake Disorder (ARFID)

This disorder involves a failure to meet nutritional and/or energy needs, leading to weight loss or nutritional deficiency, reliance on supplements or tube feeding, and significant impairment in psychosocial functioning [9]. 

It is characterized by an apparent lack of interest in eating or food, an avoidance based on food’s sensory characteristics of food or a concern about the aversive consequences of eating.

Health implications: ARFID can lead to significant weight loss or failure to achieve expected weight gain in children, nutritional deficiencies, and interference with psychosocial functioning.

Other Specified Feeding or Eating Disorders (OSFED)

OSFED includes eating disorders that do not meet the exact criteria for anorexia, bulimia, or binge eating disorder but still cause significant distress or impairment [10].

Examples include atypical anorexia nervosa (where weight remains within a normal range), purging disorder, and night eating syndrome.

How are eating disorders assessed and diagnosed?

Diagnosing eating disorders involves a comprehensive approach that assesses a range of factors, from physical symptoms to psychological behaviors. Here’s how this critical process typically unfolds:

The diagnostic process

Initial screening

The journey begins with screening, which is often conducted during initial psychiatric evaluations [11]. This step involves looking for signs indicative of an eating disorder.

Comprehensive patient evaluations

These evaluations are more in-depth and include a review of the patient’s medical, nutritional, psychological, spiritual, and social functioning. An eating disorder expert should assess the mental health aspects.

Medical examination

A crucial part of the process involves a thorough medical exam to identify any physical consequences of the eating disorder, such as issues stemming from malnourishment, over-exercise, or purging behaviors.

medical examination
Photograph: vivilandstock/Envato

Tools and criteria used

Diagnostic and Statistical Manual of Mental Disorders (DSM-5)

This manual provides the criteria used to diagnose different eating disorders. It includes specific guidelines and categories for disorders such as anorexia nervosa, bulimia nervosa, and binge-eating disorder.

Laboratory tests

To support the diagnosis, various laboratory tests may be required. These tests can include blood sugar levels, electrolyte levels, liver and kidney function tests, and electrocardiograms (ECGs) [11].

Physical indicators

Doctors also consider physical indicators like body temperature, pulse, blood pressure, weight changes, and overall physical appearance.

The role of healthcare professionals

Healthcare professionals play a pivotal role in diagnosing and assessing eating disorders. Their responsibilities include:

  • Identifying potential eating disorders based on patient history and symptoms.
  • Conducting thorough medical examinations and ordering appropriate laboratory tests.
  • Assessing the psychological and social aspects of the disorder.
  • Recommending a proper level of care based on the diagnosis.

The process of diagnosing an eating disorder requires a nuanced understanding of both the physical and psychological aspects of these complex conditions. 

Healthcare providers need to be aware of the various signs, symptoms, and risk factors associated with eating disorders to ensure accurate diagnosis and effective treatment planning​.

How can you treat and manage eating disorders?

Treating eating disorders involves a comprehensive approach that tailors to the individual’s needs. Here’s an overview of the treatment options and the importance of a holistic approach [12]:

Treatment options


This is a cornerstone in treating eating disorders. Cognitive-behavioral therapy (CBT), family-based therapy, and group therapy are commonly used. 

CBT, for instance, helps individuals recognize and change distorted thoughts leading to eating disorder behaviors [13].


While medications cannot cure eating disorders, they can be effective when combined with psychotherapy. Antidepressants are frequently used, particularly for disorders involving binge-eating or purging behaviors.

Nutritional counseling

Registered dietitians play a crucial role in recovery by helping patients understand their eating disorders and develop a plan for healthy eating habits. This may include meal planning, establishing regular eating patterns, and addressing nutritional deficiencies.

Holistic treatment approach

A holistic approach is essential in treating eating disorders, ensuring that all aspects of the individual’s well-being are addressed. This includes:

Patient-centered care

Treatment should be tailored to the individual’s unique needs, considering their physical, emotional, and social health.

Team communication

Successful management often requires coordination between various healthcare providers, including therapists, dietitians, and medical doctors.

Continuous monitoring

Eating disorders can have long-lasting effects, necessitating ongoing care and adjustments to the treatment plan as needed.

How to prevent eating disorders?

Prevention of eating disorders involves a systematic approach aimed at modifying the conditions that contribute to their development. This approach encompasses:

Addressing risk factors

Efforts may focus on reducing negative risk factors such as body dissatisfaction, depression, and overemphasis on appearance.

Enhancing protective factors

Encouraging a non-appearance-oriented self-definition and promoting intuitive eating and appreciation for the body’s functionality.

Educational programs

Prevention programs, particularly those implemented in schools and universities, are designed to alter knowledge, attitudes, and behaviors associated with eating disorders and disordered eating. These programs have shown benefits in reducing risk factors for eating disorders.

Importance of early detection and intervention

Early detection and intervention are crucial in preventing the progression of eating disorders to more severe stages. Key aspects include:

Targeted prevention programs

These can be universal (for all in a population), selective (for those at risk due to certain factors), or indicated (for those showing early signs of an eating disorder).

School and university-based programs

These have effectively reduced risk factors like body dissatisfaction, mainly through social learning, cognitive-behavioral approaches, and media literacy programs [14].

Holistic approaches

Successful prevention also involves changing the environment, such as peer behavior and media literacy, alongside individual change.

Resources for help and support

Gaining access to reliable information and support networks is vital for individuals at risk of or experiencing eating disorders. Resources include:

  • National Eating Disorders Association (NEDA) – Provides information on eating disorders, prevention strategies, and support resources [15].
  • Local healthcare providers – Engaging with your local healthcare providers for early screening and intervention, especially in individuals with known risk factors.

How to live with an eating disorder

Living with an eating disorder is undoubtedly challenging, but it’s also a path filled with opportunities for growth and transformation. 

You can navigate these challenges and move towards a healthier, more fulfilling life with the proper support and coping strategies.

Daily challenges and management

Constant struggle with food and body image

Individuals with eating disorders often face a daily battle with their thoughts and feelings about food and their body.

Physical and emotional toll

The impact of an eating disorder isn’t just physical; it can take a significant emotional toll, affecting mood, energy levels, and overall mental health.

Navigating social situations

Social events, particularly those involving food, can be challenging and may require strategies to manage anxiety and maintain healthy eating habits.

Coping strategies and support networks

Therapeutic support

Engaging in therapy, whether individual, group, or family-based, provides a space to work through the underlying issues of the eating disorder.

Building a support network

Connecting with others who understand the struggle, including support groups and online communities, can provide invaluable support and encouragement.

Developing healthy coping mechanisms

Learning and practicing healthy coping strategies for dealing with stress and negative emotions is crucial. This can include mindfulness, physical activity, and creative outlets.

Ongoing self-care and compassion

Regular self-care activities and practicing self-compassion are vital for managing an eating disorder. This includes acknowledging progress, no matter how small.

Closing thoughts

Eating disorders demand our attention and understanding. Through this exploration, we’ve seen how they encompass a range of definitions, symptoms, causes, and types, each presenting unique challenges and requiring specific approaches for diagnosis, treatment, and management. 

Acknowledging the impacts of these disorders on daily life and the importance of early intervention and prevention is crucial. 

If you or someone you know is affected, help and recovery are possible. This journey is not one to walk alone; support networks, healthcare professionals, and therapeutic strategies offer a path toward healing and hope.


How do you know if you have an eating disorder?

Abnormal or disturbed eating habits and an extreme concern with body weight or shape characterize an eating disorder. Key indicators include drastic weight changes, unhealthy preoccupation with food or body image, and disruptive eating patterns.

What typically causes eating disorders?

Eating disorders typically stem from a complex mix of biological, psychological, and sociocultural factors. These include genetic predisposition, mental health issues, societal beauty standards, and personal experiences with trauma or stress.

Which eating disorder is the most severe?

Anorexia nervosa is often considered the most severe eating disorder due to its high mortality rate and the extensive physical and psychological health issues it can cause, including malnutrition, heart problems, and severe mental distress.

Is food addiction an eating disorder?

Food addiction, characterized by compulsive overeating and an obsessive relationship with food, is not officially classified as an eating disorder. However, it shares similarities with binge eating disorder and is recognized as a severe behavioral issue needing attention.


The information included in this article is for informational purposes only. The purpose of this webpage is to promote broad consumer understanding and knowledge of various health topics. It is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment and before undertaking a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read on this website.