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Understanding Eating Disorders

This informational page explores eating disorders, including anorexia nervosa, bulimia nervosa, binge-eating disorder, avoidant restrictive food intake disorder, and other feeding and eating disorders; possible warning signs and medical complications; diagnosis, treatment, recovery, support, and life beyond a diagnosis.

Eating disorders are serious mental and medical illnesses—not diets, phases, lifestyle choices, or failures of self-control. They can affect people of every age, sex, race, ethnicity, body shape, and body weight. Someone can appear healthy while experiencing severe illness. This information is intended for education and should not replace an individualized medical evaluation, diagnosis, treatment plan, nutritional guidance, crisis response, or care from qualified eating-disorder professionals.

Understanding Feeding and Eating Disorders

What Are Eating Disorders? Serious Mental and Medical Illnesses That Affect Eating, Thoughts, Emotions, and Physical Health

Eating disorders involve persistent disturbances in eating behaviors and related thoughts, emotions, or beliefs that affect a person’s physical health, mental health, relationships, and ability to manage everyday life.

They are not choices, diets, phases, failures of self-control, or conditions that can be identified by looking at someone’s body.

More Than Food or Weight

Eating Disorders Affect the Whole Person

An eating disorder may change how someone eats, thinks about food, responds to hunger or fullness, experiences their body, manages emotions, or participates in meals and social activities.

Some people restrict how much they eat. Some experience episodes of binge eating. Others may use vomiting, fasting, excessive exercise, laxatives, or other behaviors in an attempt to compensate for eating.

Certain eating disorders involve intense concerns about weight or body shape. Others may involve sensory sensitivity, fear of choking or vomiting, low interest in food, or avoidance unrelated to a desire to lose weight.

Eating disorders can affect the heart, brain, digestive system, bones, hormones, muscles, sleep, concentration, emotional regulation, and many other areas of health.

Eating disorders are mental illnesses with real physical consequences. They deserve medical care, psychological treatment, nutritional support, and compassion.

An Important Clarification

You Cannot Identify an Eating Disorder by Looking at Someone

A person with an eating disorder may be underweight, average-sized, living in a larger body, muscular, athletic, or experiencing weight changes that are not obvious to others.

Someone may continue working, studying, exercising, socializing, parenting, or appearing energetic while experiencing serious medical or psychological symptoms.

Body weight alone does not reveal whether someone is restricting food, binge eating, purging, malnourished, medically unstable, or experiencing obsessive thoughts about eating and body image.

A person does not need to “look sick” or reach a certain weight before their symptoms deserve treatment.

Eating Disorders Can Affect Many Areas

Symptoms May Be Behavioral, Emotional, Cognitive, or Physical

The symptoms vary by diagnosis and individual. A person may experience only some of these signs, and not every behavior automatically indicates an eating disorder.

Eating Behaviors

Changes in Eating Patterns

  • Skipping meals or eating very small amounts
  • Following increasingly rigid food rules
  • Eating large amounts with a sense of lost control
  • Eating secretly or hiding food-related behaviors
  • Avoiding entire food groups without medical guidance
  • Leaving meals frequently or immediately after eating

Compensatory Behaviors

Attempts to “Undo” Eating

  • Self-induced vomiting
  • Fasting after eating
  • Compulsive or excessive exercise
  • Misusing laxatives, diuretics, or other substances
  • Repeatedly checking weight or body measurements
  • Feeling obligated to earn or compensate for food

Thoughts and Beliefs

Food or Body Concerns Take Up Mental Space

  • Constantly thinking about food, calories, or weight
  • Intense fear of weight gain
  • Feeling that body shape determines personal worth
  • Difficulty recognizing the seriousness of symptoms
  • Rigid beliefs about “good,” “bad,” or forbidden foods
  • Fear of choking, vomiting, contamination, or food textures

Emotional Symptoms

Shame, Anxiety, or Distress Around Eating

  • Guilt or shame after eating
  • Anxiety before meals or around certain foods
  • Irritability when eating routines change
  • Feeling out of control during binge episodes
  • Low self-worth or intense body dissatisfaction
  • Withdrawing from meals, events, or relationships

Physical Symptoms

Changes in Health and Body Functioning

  • Dizziness, fainting, weakness, or persistent fatigue
  • Feeling unusually cold
  • Digestive discomfort or constipation
  • Changes in menstrual or hormonal functioning
  • Dental, throat, or gastrointestinal problems
  • Changes in heart rate, blood pressure, or hydration

Daily-Life Impact

Eating Becomes Harder to Navigate

  • Avoiding restaurants or shared meals
  • Difficulty concentrating at school or work
  • Arguments or secrecy related to eating
  • Financial strain related to binge eating or food rules
  • Reduced participation in social activities
  • Organizing daily life around food or exercise behaviors

Different Feeding and Eating Disorders

Eating Disorders Can Follow Several Patterns

Each diagnosis has specific criteria. People may also experience clinically significant symptoms that do not fit stereotypes or the most commonly discussed disorders.

01

Anorexia Nervosa

Restriction and Fear of Weight Gain

Anorexia nervosa involves significantly restricted energy intake, intense fear of gaining weight or persistent behaviors that interfere with weight gain, and disturbances in how body weight or shape is experienced.

02

Bulimia Nervosa

Binge Eating Followed by Compensatory Behaviors

Bulimia nervosa involves recurring binge-eating episodes followed by behaviors intended to prevent weight gain, such as vomiting, fasting, excessive exercise, or medication misuse.

03

Binge-Eating Disorder

Recurring Episodes of Lost Control

Binge-eating disorder involves recurring episodes of eating unusually large amounts while feeling unable to control the eating, without regular compensatory behaviors afterward.

04

ARFID

Restrictive Eating Without Weight-Shape Concerns

Avoidant restrictive food intake disorder may involve low interest in eating, sensory sensitivity, or fear of consequences such as choking or vomiting. It is not driven by a desire to change body shape or weight.

05

OSFED

Significant Symptoms That Do Not Fit One Full Category

Other specified feeding or eating disorder includes serious eating-disorder patterns that cause distress or impairment but do not meet every criterion for another diagnosis.

06

Other Feeding Disorders

Pica and Rumination Disorder

Pica involves eating nonfood substances. Rumination disorder involves repeated regurgitation of food that is not better explained by another medical condition.

Another Important Clarification

Not Every Eating Disorder Is About Wanting to Be Thin

Body dissatisfaction and fear of weight gain are important features of some eating disorders, including anorexia nervosa and bulimia nervosa.

However, restrictive eating may also result from sensory sensitivity, low appetite, fear of choking, fear of vomiting, previous traumatic experiences involving food, or difficulty recognizing internal hunger signals.

People may avoid foods because of texture, smell, temperature, appearance, predictability, contamination concerns, allergies, digestive symptoms, or fear of physical consequences.

Assuming that every eating disorder is motivated by appearance can cause ARFID and other feeding difficulties to be missed.

Challenging Stigma

Eating Disorders Are Not Choices or Failures of Willpower

Eating-disorder behaviors may begin as attempts to cope, control distress, manage fear, follow dieting rules, avoid uncomfortable sensations, or respond to social pressure.

Over time, malnutrition, repetitive behaviors, anxiety, shame, and changes in thinking can make the pattern increasingly difficult to interrupt without support.

Telling someone to “just eat,” “just stop,” or “use more self-control” does not address the mental, behavioral, social, and medical factors involved.

A person does not choose to develop an eating disorder, but with appropriate treatment and support, recovery is possible.

Why Eating Disorders Develop

There Is Usually No Single Cause

Eating disorders may develop through an interaction of biological, psychological, developmental, social, cultural, environmental, and life-experience factors.

Genetic or family vulnerability

Dieting, food restriction, or weight cycling

Trauma, bullying, abuse, or chronic stress

Perfectionism, anxiety, or rigid thinking patterns

Weight stigma, discrimination, or appearance pressure

Sports, careers, or environments emphasizing weight

Autism, ADHD, sensory differences, or interoceptive differences

Food insecurity, illness, pain, or gastrointestinal symptoms

Medical and Mental-Health Risks

Eating Disorders Can Become Life-Threatening

Restriction, purging, binge eating, dehydration, malnutrition, and medication misuse can affect the heart, electrolytes, blood pressure, digestive system, brain, bones, kidneys, hormones, and other organs.

Medical risk cannot always be predicted from weight, appearance, diagnosis, or how long the symptoms have been present.

Eating disorders may also occur with depression, anxiety, obsessive-compulsive symptoms, trauma-related conditions, substance use, self-harm, and suicidal thoughts.

Fainting, chest pain, severe weakness, confusion, vomiting blood, difficulty breathing, an irregular heartbeat, severe dehydration, or an inability to keep food or fluids down requires urgent medical attention.

Professional Assessment

Eating Disorders Require a Complete Evaluation

Assessment may include eating behaviors, thoughts about food and the body, physical symptoms, medical testing, mental health, sensory needs, medication, exercise, and changes in daily functioning.

Eating Patterns

Restriction, binge eating, purging, food avoidance, and meal routines are reviewed without judgment.

Thoughts and Emotions

Fear, shame, body-image concerns, sensory discomfort, and distress around eating may be explored.

Medical Health

Vital signs, blood tests, hydration, heart functioning, and other health concerns may require evaluation.

Daily Functioning

Effects on work, education, relationships, finances, routines, and social activities are considered.

Related Conditions

Depression, anxiety, trauma, autism, ADHD, OCD, and substance use may overlap or affect treatment.

Individual Needs

Culture, disability, finances, food access, communication, and sensory needs should be considered.

Treatment and Recovery

Recovery From an Eating Disorder Is Possible

Treatment may include medical monitoring, psychotherapy, nutritional rehabilitation, medication when appropriate, family or caregiver support, occupational therapy, and treatment for related mental-health or medical conditions.

The appropriate level of care depends on medical stability, eating-disorder behaviors, mental health, safety, available support, and the person’s ability to eat and function safely.

Recovery may involve restoring nutrition, reducing harmful behaviors, developing flexible eating patterns, rebuilding trust in the body, addressing fear and shame, and creating a life that is not controlled by the disorder.

An eating disorder can affect someone’s thoughts, behaviors, emotions, and body—but it does not define their worth, identity, intelligence, strength, or future.