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Eating disorders

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Serious mental and medical conditions involving abnormal eating behaviors, body image concerns, and health risks

Eating disorders
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Synonyms N/A
Pronounce N/A
Specialty N/A
Symptoms Food restriction, binge eating, purging, excessive exercise, body image distress, fear of weight gain, weight changes, medical complications
Complications N/A
Onset N/A
Duration N/A
Types Anorexia nervosa, bulimia nervosa, binge eating disorder, avoidant/restrictive food intake disorder, pica, rumination disorder, other specified feeding or eating disorder
Causes N/A
Risks Malnutrition, electrolyte abnormalities, heart rhythm problems, gastrointestinal injury, osteoporosis, depression, anxiety, suicide risk, obesity-related complications in binge eating disorder
Diagnosis Clinical evaluation, medical history, eating behavior assessment, physical examination, laboratory testing, DSM-5-TR criteria, mental health evaluation
Differential diagnosis N/A
Prevention N/A
Treatment Psychotherapy, nutritional rehabilitation, medical monitoring, family-based therapy, cognitive behavioral therapy, medications when appropriate, higher level of care when needed
Medication N/A
Prognosis N/A
Frequency N/A
Deaths N/A


W8MD Weight Loss, Sleep and MedSpa physicians can help screen for, diagnose, medically monitor, and treat many common eating-related problems, including binge eating disorder, night eating syndrome, obesity-related disordered eating, and weight cycling.
Eating disorder care should focus on health, recovery, nutrition, metabolic risk, and long-term stability rather than shame, blame, or unsafe dieting.
Structured nutrition counseling, meal replacements, and medical monitoring may help selected patients, but restrictive plans must be used carefully in patients with active or past eating disorders.

Eating disorders are serious mental health and medical conditions characterized by persistent disturbances in eating behavior, food intake, body weight regulation, or body image that cause significant physical, psychological, and social harm. Eating disorders are not lifestyle choices, vanity, weakness, or lack of willpower. They are complex illnesses influenced by genetic, biological, psychological, social, cultural, metabolic, and environmental factors.

Eating disorders can affect people of all ages, body sizes, genders, races, ethnicities, and socioeconomic backgrounds. A person does not have to be underweight to have a serious eating disorder. Many patients with bulimia nervosa, binge eating disorder, atypical anorexia nervosa, night eating syndrome, or other specified feeding or eating disorder may be normal weight, overweight, or obese while still having serious medical and psychological risk.

The National Institute of Mental Health describes eating disorders as serious and sometimes fatal illnesses involving severe disturbances in eating behaviors, and notes that obsessions with food, body weight, and shape may be signs of an eating disorder.Eating Disorders(link). National Institute of Mental Health. The American Psychiatric Association describes eating disorders as serious medical conditions involving severe and persistent disturbances in eating behaviors and associated distressing thoughts and emotions that impair psychosocial functioning.What are Eating Disorders?(link). American Psychiatric Association.

W8MD Weight Loss, Sleep and MedSpa Centers can help patients by screening for eating disorders, identifying medical complications, recognizing unsafe dieting patterns, evaluating obesity-related binge eating, helping with binge eating disorder, night eating syndrome, emotional eating, insulin resistance, sleep apnea, weight cycling, and obesity, and coordinating referrals to mental health, psychiatry, dietitian, or specialty eating-disorder programs when needed. Severe eating disorders such as medically unstable anorexia nervosa, severe bulimia nervosa, electrolyte abnormalities, suicidality, or rapid weight loss require urgent specialty care.

Overview

Eating disorders involve more than food. They often include distressing thoughts, emotions, and behaviors related to:

  • Food
  • Eating
  • Hunger
  • Fullness
  • Body weight
  • Body shape
  • Calories
  • Exercise
  • Control
  • Shame
  • Anxiety
  • Depression
  • Trauma
  • Perfectionism
  • Impulsivity
  • Metabolic health

Eating disorders may lead to starvation, malnutrition, obesity, diabetes risk, electrolyte abnormalities, cardiac complications, digestive problems, infertility, bone loss, dental damage, depression, anxiety, and suicide risk.

Major types of eating disorders

The major feeding and eating disorders include:

Related or commonly discussed conditions include:

StatPearls lists major eating disorder categories including anorexia nervosa, bulimia nervosa, binge eating disorder, avoidant/restrictive food intake disorder, pica, rumination, other specified feeding or eating disorders, night eating syndrome, atypical anorexia nervosa, purging disorder, orthorexia, and unspecified feeding or eating disorders.Eating Disorders(link). StatPearls, NCBI Bookshelf.

Anorexia nervosa

Anorexia nervosa is an eating disorder characterized by restriction of energy intake, significantly low body weight relative to age, sex, developmental trajectory, and physical health, intense fear of gaining weight, and disturbance in the way body weight or shape is experienced.Anorexia Nervosa(link). StatPearls, NCBI Bookshelf.

Common features include:

  • Severe food restriction
  • Intense fear of weight gain
  • Distorted body image
  • Excessive weighing
  • Avoidance of meals
  • Ritualized eating
  • Excessive exercise
  • Amenorrhea or menstrual changes
  • Cold intolerance
  • Fatigue
  • Hair thinning
  • Low heart rate
  • Low blood pressure
  • Bone loss

Anorexia nervosa may be restricting type or binge-eating/purging type. It can be life-threatening and requires prompt medical and psychiatric care.

Atypical anorexia nervosa

Atypical anorexia nervosa has many features of anorexia nervosa, but the person’s weight may remain in or above the normal range despite significant weight loss and serious medical risk. This condition is often missed because clinicians or families may falsely assume that a person cannot be medically unstable unless underweight.

Warning signs include:

  • Rapid weight loss
  • Severe dietary restriction
  • Fear of weight gain
  • Body image disturbance
  • Dizziness
  • Fainting
  • Low heart rate
  • Menstrual irregularity
  • Excessive exercise
  • Preoccupation with calories

Bulimia nervosa

Bulimia nervosa is characterized by recurrent episodes of binge eating followed by inappropriate compensatory behaviors to prevent weight gain, such as self-induced vomiting, laxative misuse, diuretic misuse, fasting, or excessive exercise. Bulimia can occur at any body weight.

Common signs include:

  • Binge eating episodes
  • Feeling out of control while eating
  • Self-induced vomiting
  • Laxative or diuretic misuse
  • Excessive exercise
  • Shame after eating
  • Swollen salivary glands
  • Dental enamel erosion
  • Sore throat
  • Heartburn
  • Electrolyte imbalance
  • Irregular heartbeat

The 2023 American Psychiatric Association practice guideline recommends eating-disorder-focused cognitive behavioral therapy for adults with bulimia nervosa and also recommends a serotonin reuptake inhibitor such as fluoxetine 60 mg daily either initially or if there is minimal or no response to psychotherapy alone by six weeks."The American Psychiatric Association Practice Guideline for the Treatment of Patients With Eating Disorders".American Journal of Psychiatry.2023;180(2)

167-171.doi:10.1176/appi.ajp.23180001.PMID:36722117.

Binge eating disorder

Binge eating disorder is characterized by recurrent episodes of eating a large amount of food with a sense of loss of control, without regular compensatory purging behaviors. It is the most common eating disorder in many clinical settings and is strongly associated with obesity, weight cycling, insulin resistance, prediabetes, type 2 diabetes, fatty liver disease, sleep apnea, depression, anxiety, and shame.

Features include:

  • Eating unusually large amounts of food
  • Feeling unable to stop eating
  • Eating rapidly
  • Eating until uncomfortably full
  • Eating when not physically hungry
  • Eating alone due to embarrassment
  • Feeling guilt, shame, or disgust afterward
  • No regular purging behavior

DSM-5-TR criteria include binge eating at least once weekly for three months without regular compensatory behaviors.Binge Eating Disorder(link). StatPearls.

Avoidant/restrictive food intake disorder

Avoidant/restrictive food intake disorder or ARFID is an eating disorder involving avoidant or restrictive eating that leads to weight loss, nutritional deficiency, dependence on supplements or tube feeding, or psychosocial impairment. Unlike anorexia nervosa, ARFID is not driven by fear of fatness or body image distortion.

ARFID may involve:

  • Low appetite
  • Sensory sensitivity to food texture, smell, or taste
  • Fear of choking
  • Fear of vomiting
  • Fear of allergic reaction
  • Very limited food variety
  • Failure to gain expected weight in children
  • Nutritional deficiency
  • Social impairment

StatPearls describes ARFID as significant limitations in food intake leading to malnutrition, weight loss, or nutritional deficiency without the body image disturbance typically seen in anorexia nervosa or bulimia nervosa.Avoidant Restrictive Food Intake Disorder(link). StatPearls.

Pica

Pica is persistent eating of non-food, non-nutritive substances such as clay, soil, chalk, paper, ice, paint chips, laundry starch, hair, or soap. It may occur in children, pregnancy, iron deficiency, developmental disability, autism spectrum disorder, or psychiatric conditions.

Complications may include:

  • Iron deficiency
  • Lead poisoning
  • Intestinal obstruction
  • Dental injury
  • Infection
  • Malnutrition
  • Toxic exposure

Rumination disorder

Rumination disorder involves repeated regurgitation of food after eating. Regurgitated food may be rechewed, reswallowed, or spit out. It is not explained by vomiting from a gastrointestinal illness.

Possible consequences include:

  • Weight loss
  • Malnutrition
  • Bad breath
  • Dental erosion
  • Social embarrassment
  • Esophagitis
  • Feeding difficulty in children

Other specified feeding or eating disorder

Other specified feeding or eating disorder or OSFED includes clinically significant eating disorder symptoms that do not meet full criteria for another diagnosis. OSFED can be serious and medically dangerous.

Examples include:

Unspecified feeding or eating disorder

Unspecified feeding or eating disorder or UFED is used when symptoms cause distress or impairment but do not clearly fit another category or when there is insufficient information to make a more specific diagnosis.

Orthorexia nervosa

Orthorexia nervosa is an unhealthy obsession with eating only foods considered “clean,” “pure,” “healthy,” or “safe.” It is not a formal DSM-5-TR diagnosis, but it can cause significant impairment and may overlap with anorexia nervosa, obsessive-compulsive traits, anxiety, or excessive dieting.

Possible signs include:

  • Rigid food rules
  • Fear of “unclean” foods
  • Anxiety when preferred foods are unavailable
  • Social isolation
  • Nutritional deficiency
  • Moral judgment around food
  • Excessive time spent researching food
  • Restriction that becomes unhealthy

Night eating syndrome

Night eating syndrome involves recurrent evening or nighttime eating, often with insomnia, morning lack of appetite, and distress. It may overlap with obesity, depression, anxiety, sleep disorders, and circadian rhythm disruption.

Common features include:

  • Eating a large proportion of calories after dinner
  • Waking from sleep to eat
  • Difficulty sleeping unless eating
  • Morning lack of appetite
  • Guilt or distress
  • Weight gain
  • Insomnia

Purging disorder

Purging disorder involves recurrent purging behavior to influence weight or shape without objectively large binge eating episodes. Purging may include vomiting, laxatives, diuretics, enemas, fasting, or excessive exercise.

Risks include:

  • Electrolyte imbalance
  • Irregular heartbeat
  • Dental erosion
  • Esophageal injury
  • Dehydration
  • Kidney injury
  • Laxative dependence

Diabulimia

Diabulimia is an informal term for insulin restriction or omission in people with type 1 diabetes to lose weight. It is not a formal DSM diagnosis, but it is medically dangerous.

Potential complications include:

  • Severe hyperglycemia
  • Diabetic ketoacidosis
  • Dehydration
  • Neuropathy
  • Retinopathy
  • Kidney disease
  • Hospitalization
  • Death

Patients with suspected insulin omission require urgent diabetes and mental health care.

Muscle dysmorphia and compulsive exercise

Muscle dysmorphia is a body image disorder in which a person becomes preoccupied with being insufficiently muscular. It may involve excessive exercise, rigid dieting, supplement misuse, anabolic steroid use, and distress about body appearance.

Compulsive exercise can occur in anorexia nervosa, bulimia nervosa, orthorexia, and other eating disorders. Exercise becomes harmful when it is driven by fear, guilt, punishment, injury, or inability to rest.

Disordered eating versus eating disorder

Disordered eating refers to unhealthy eating behaviors that may not meet full diagnostic criteria for an eating disorder but still cause harm. Examples include chronic dieting, meal skipping, fasting-binge cycles, guilt after eating, emotional overeating, compulsive calorie tracking, or rigid food rules.

Disordered eating can progress to an eating disorder, especially when combined with body dissatisfaction, weight stigma, trauma, depression, anxiety, or repeated dieting.

Risk factors

Risk factors for eating disorders include:

  • Family history of eating disorders
  • Family history of depression or anxiety
  • Dieting
  • Weight cycling
  • Body dissatisfaction
  • Weight stigma
  • Bullying
  • Trauma
  • Abuse history
  • Perfectionism
  • Impulsivity
  • Low self-esteem
  • Anxiety
  • Depression
  • Obsessive-compulsive traits
  • Athletic pressure
  • Dance, gymnastics, wrestling, bodybuilding, modeling, or weight-class sports
  • Social media pressure
  • Food insecurity
  • Chronic medical illness
  • Type 1 diabetes
  • Obesity-related shame

Warning signs

Possible warning signs include:

  • Skipping meals
  • Extreme dieting
  • Fear of eating in public
  • Cutting out many food groups
  • Binge eating
  • Vomiting after meals
  • Laxative or diuretic use
  • Excessive exercise
  • Rapid weight loss
  • Repeated weight cycling
  • Obsession with calories
  • Obsession with body shape
  • Avoiding social events involving food
  • Eating secretly
  • Food rituals
  • Hoarding food
  • Frequent bathroom trips after meals
  • Dizziness or fainting
  • Hair loss
  • Feeling cold
  • Menstrual changes
  • Dental problems

Medical complications

Eating disorders can affect every organ system.

Potential complications include:

  • Malnutrition
  • Electrolyte abnormalities
  • Low potassium
  • Heart rhythm problems
  • Low heart rate
  • Low blood pressure
  • Dehydration
  • Kidney injury
  • Dental erosion
  • Esophagitis
  • Gastroparesis
  • Constipation
  • Bone loss
  • Infertility
  • Menstrual irregularity
  • Low testosterone
  • Anemia
  • Hair loss
  • Fatigue
  • Depression
  • Anxiety
  • Suicide risk

Diagnosis

Eating disorders are diagnosed through clinical evaluation. A medical clinician, mental health professional, psychiatrist, psychologist, or eating-disorder specialist may evaluate symptoms, behaviors, medical stability, and DSM-5-TR diagnostic criteria.

Assessment may include:

  • Eating history
  • Weight history
  • Dieting history
  • Binge eating assessment
  • Purging behavior assessment
  • Exercise behavior assessment
  • Body image assessment
  • Psychiatric history
  • Medication history
  • Substance use history
  • Trauma history
  • Family history
  • Physical examination
  • Laboratory testing
  • Electrocardiogram when indicated

Laboratory and medical evaluation

Medical evaluation may include:

  • Complete blood count
  • Comprehensive metabolic panel
  • Electrolytes
  • Magnesium
  • Phosphorus
  • Thyroid testing
  • Liver enzymes
  • Kidney function
  • Urinalysis
  • Hemoglobin A1c
  • Lipid profile
  • Pregnancy test when appropriate
  • Electrocardiogram
  • Bone density testing when indicated
  • Dental evaluation

Levels of care

Treatment intensity depends on medical risk, psychiatric risk, weight status, purging frequency, suicidality, and ability to eat safely.

Levels of care include:

  • Outpatient care
  • Intensive outpatient program
  • Partial hospitalization program
  • Residential eating-disorder treatment
  • Inpatient psychiatric hospitalization
  • Medical hospitalization

Treatment overview

Treatment usually requires a coordinated care team.

Team members may include:

  • Primary care physician
  • Obesity medicine physician
  • Psychiatrist
  • Psychologist
  • Therapist
  • Registered dietitian
  • Family therapist
  • Pediatrician or adolescent medicine specialist
  • Endocrinologist
  • Dentist
  • Cardiologist when needed

Psychotherapy

Evidence-based psychotherapy may include:

Nutritional rehabilitation

Nutrition treatment focuses on restoring safe eating patterns, correcting deficiencies, reducing food fear, stabilizing weight, and normalizing hunger and fullness signals.

Goals may include:

  • Regular meals
  • Adequate protein
  • Adequate calories
  • Electrolyte correction
  • Avoiding binge-restrict cycles
  • Reducing food rules
  • Reintroducing feared foods
  • Stopping purging behaviors
  • Restoring weight when needed
  • Stabilizing metabolic health

Medications

Medications may be used for selected eating disorders or coexisting conditions.

Examples include:

  • Fluoxetine for bulimia nervosa
  • Lisdexamfetamine for binge eating disorder in selected adults
  • SSRIs for depression or anxiety
  • Topiramate in selected binge-eating cases, with caution
  • Treatment of ADHD when appropriate
  • Treatment of sleep disorders when appropriate
  • Diabetes medication adjustment when needed

Medication should not replace psychotherapy and nutrition treatment.

Eating disorders and obesity

Eating disorders can occur at any body weight. Patients with obesity may have binge eating disorder, night eating, emotional eating, trauma-related eating, weight cycling, or disordered dieting. Treating obesity without screening for eating disorders can worsen restriction-binge cycles, shame, and regain.

Important principles include:

  • Avoid shame-based care
  • Avoid crash diets
  • Screen for binge eating before restrictive diets
  • Screen for purging before medication use
  • Focus on metabolic health
  • Address sleep apnea
  • Address insulin resistance
  • Preserve lean mass
  • Use structured follow-up
  • Refer severe cases to specialists

Binge eating disorder and medical weight loss

Binge eating disorder is one of the eating disorders most relevant to medical weight loss clinics. Patients may seek weight loss care because of obesity, but the underlying driver may be binge eating, night eating, emotional eating, sleep deprivation, depression, trauma, or severe insulin resistance.

A comprehensive program may help by combining:

  • Medical assessment
  • Binge eating screening
  • Nutrition counseling
  • Protein planning
  • Structured meals
  • Sleep apnea screening
  • Medication review
  • Behavioral support
  • GLP-1 evaluation when appropriate
  • Mental health referral
  • Long-term maintenance planning

Eating disorders and sleep

Sleep problems can worsen eating patterns. Sleep apnea, insomnia, delayed sleep timing, shift work, and short sleep can increase hunger, cravings, fatigue, and nighttime eating.

Sleep-related contributors include:

How W8MD can help diagnose eating disorders

W8MD Weight Loss, Sleep and MedSpa physicians can help identify eating disorders and related eating problems during medical weight-loss and sleep evaluations.

W8MD may help with:

  • Screening for binge eating disorder
  • Screening for night eating syndrome
  • Screening for emotional eating
  • Screening for unsafe restriction
  • Screening for purging behaviors
  • Weight history review
  • Diet history review
  • Medication review
  • Medical complication assessment
  • Laboratory testing when appropriate
  • Sleep apnea screening
  • Mental health referral when needed
  • Eating-disorder specialist referral when needed

How W8MD can help treat common eating-related problems

W8MD can help treat many common eating-related and weight-related problems, especially when they overlap with obesity, insulin resistance, sleep apnea, and metabolic syndrome.

W8MD may help patients with:

  • Binge eating disorder
  • Night eating syndrome
  • Emotional eating
  • Weight cycling
  • Obesity with disordered eating
  • Insulin resistance and cravings
  • Prediabetes and overeating patterns
  • Sleep apnea-related fatigue and cravings
  • Postmenopausal weight gain with overeating
  • PCOS-related weight gain and cravings

W8MD treatment may include:

When W8MD should refer to specialty eating-disorder care

Some eating disorders require urgent or specialized treatment beyond a standard weight-loss clinic.

Referral or urgent care is needed for:

  • Severe anorexia nervosa
  • Medically unstable weight loss
  • Low heart rate
  • Fainting
  • Electrolyte abnormalities
  • Frequent vomiting
  • Laxative or diuretic abuse
  • Diabulimia
  • Suicidal thoughts
  • Severe depression
  • Pregnancy with eating disorder
  • Adolescents with rapid weight loss
  • Failure to eat enough to maintain health
  • Need for inpatient or residential care

W8MD and safe weight management in patients with eating disorder history

Patients with a past eating disorder may still need medical treatment for obesity, diabetes, sleep apnea, or insulin resistance. W8MD can help by avoiding unsafe restriction and using careful monitoring.

Principles include:

  • Avoid crash diets
  • Avoid shame-based weigh-ins
  • Avoid extreme calorie restriction unless medically supervised and appropriate
  • Screen for relapse symptoms
  • Focus on protein, sleep, and metabolic health
  • Include mental health support
  • Monitor purging or binge urges
  • Use GLP-1 medications cautiously when appropriate
  • Coordinate with therapist or dietitian

Frequently asked questions

What are eating disorders?

Eating disorders are serious mental and medical conditions involving abnormal eating behaviors, distressing thoughts about food or body shape, and physical or psychological harm.

What are the main types of eating disorders?

Major eating disorders include anorexia nervosa, bulimia nervosa, binge eating disorder, avoidant/restrictive food intake disorder, pica, rumination disorder, other specified feeding or eating disorder, and unspecified feeding or eating disorder.

Can eating disorders occur in people with obesity?

Yes. Eating disorders can occur at any weight. Binge eating disorder, night eating syndrome, bulimia nervosa, purging disorder, and atypical anorexia can occur in people with overweight or obesity.

What is the most common eating disorder?

Binge eating disorder is commonly reported as one of the most common eating disorders, especially in weight management and obesity medicine settings.

Can W8MD diagnose eating disorders?

W8MD physicians can screen for and diagnose many common eating-related problems and identify when specialty mental health or eating-disorder care is needed.

Can W8MD treat eating disorders?

W8MD can help treat many common eating-related conditions such as binge eating disorder, night eating syndrome, emotional eating, weight cycling, and obesity-related disordered eating, especially when combined with medical weight loss, sleep care, and referrals. Severe anorexia, severe bulimia, medical instability, or suicidality require urgent specialty care.

Is binge eating disorder treated differently from obesity?

Yes. Binge eating disorder requires attention to loss of control eating, emotional triggers, shame, depression, anxiety, sleep, and behavioral treatment. Weight loss alone is not enough.

Can GLP-1 medications help binge eating?

GLP-1 medications may reduce appetite and cravings in some patients, but they are not a substitute for eating-disorder evaluation and therapy. They should be used carefully and medically supervised.

What are warning signs of a dangerous eating disorder?

Warning signs include rapid weight loss, fainting, chest pain, purging, laxative abuse, severe restriction, suicidal thoughts, electrolyte abnormalities, and inability to eat safely.

Can eating disorders be cured?

Recovery is possible. Many people achieve lasting improvement, but ongoing support may be needed to prevent relapse.

When to seek urgent medical help

Seek urgent medical help for:

  • Fainting
  • Chest pain
  • Irregular heartbeat
  • Severe weakness
  • Confusion
  • Severe dehydration
  • Vomiting blood
  • Severe electrolyte abnormalities
  • Suicidal thoughts
  • Rapid weight loss
  • Refusal to eat or drink
  • Diabetic ketoacidosis
  • Pregnancy with severe restriction or purging

See also

Further reading

  • Eating Disorders(link). National Institute of Mental Health.
  • Eating Disorders: What You Need to Know(link). National Institute of Mental Health.
  • What are Eating Disorders?(link). American Psychiatric Association.
  • "The American Psychiatric Association Practice Guideline for the Treatment of Patients With Eating Disorders".American Journal of Psychiatry.2023;180(2)
167-171.doi:10.1176/appi.ajp.23180001.PMID:36722117.
  • Eating Disorders(link). StatPearls, NCBI Bookshelf.
  • Anorexia Nervosa(link). StatPearls, NCBI Bookshelf.
  • Bulimia Nervosa(link). StatPearls, NCBI Bookshelf.
  • Binge Eating Disorder(link). StatPearls.
  • Avoidant Restrictive Food Intake Disorder(link). StatPearls.

External links



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