There are several recognized types of eating disorders, each with distinct patterns of behavior and physical effects. The major categories include anorexia nervosa, bulimia nervosa, binge eating disorder, avoidant/restrictive food intake disorder (ARFID), pica, and rumination disorder. A broader category called “other specified feeding or eating disorders” captures conditions that don’t fit neatly into those boxes but still cause serious harm.
Anorexia Nervosa
Anorexia nervosa involves restricting food intake to the point of reaching a significantly low body weight, paired with an intense fear of gaining weight and a distorted perception of one’s own body. People with anorexia often don’t recognize how serious their weight loss has become. The condition has a lifetime prevalence of about 0.6% in adults, and it’s three times more common in women than men.
There are two subtypes. The restricting type involves weight loss through dieting, fasting, or excessive exercise without binge eating or purging. The binge-eating/purging type involves cycles of binge eating followed by self-induced vomiting or misuse of laxatives, even while maintaining a dangerously low weight.
Anorexia carries the highest mortality risk of any eating disorder. A large meta-analysis found that people with anorexia had a standardized mortality risk nearly six times higher than the general population over an average follow-up of about 14 years. Malnutrition can cause the heart muscle to shrink and the heart rate to drop below 60 beats per minute at rest. Many people also develop postural orthostatic tachycardia syndrome (POTS), which causes dizziness, rapid heartbeat, and lightheadedness when standing up. Recovery is possible but often slow. Previous studies have found that roughly half of patients achieve complete recovery, though maintaining it long-term remains difficult for many.
Bulimia Nervosa
Bulimia nervosa is defined by repeated cycles of binge eating followed by compensatory behaviors to prevent weight gain. A binge episode means eating an unusually large amount of food within about two hours while feeling unable to stop. The compensatory behaviors that follow can include self-induced vomiting, laxative or diuretic misuse, fasting, or excessive exercise. To meet the clinical threshold, both the bingeing and compensatory behaviors need to occur at least once a week for three months.
Unlike anorexia, people with bulimia are often at a normal weight or even above it, which can make the condition less visible to others. Self-worth is heavily tied to body shape and weight. The overall prevalence is about 0.3% at any given time and about 1.0% over a lifetime, with women affected five times more often than men.
The physical toll centers on electrolyte imbalances caused by repeated vomiting and laxative use, which raise the risk of dangerous heart rhythm abnormalities. Some people use ipecac to induce vomiting, which is directly toxic to the heart and can lead to heart failure. The standardized mortality risk for bulimia is about 1.9 times that of the general population, lower than anorexia but still significantly elevated. The suicide risk is also elevated, at roughly 7.5 times the general population rate.
Binge Eating Disorder
Binge eating disorder (BED) is the most common eating disorder in the United States, with a lifetime prevalence of 2.8%. It shares the binge eating component of bulimia but without the regular use of compensatory behaviors like purging or fasting. People with BED eat large quantities of food in short periods, feel a painful lack of control during episodes, and often experience intense shame or distress afterward. It affects women about twice as often as men.
Because there’s no purging to offset the caloric intake, BED is frequently associated with weight gain and obesity, though not everyone with BED is overweight. The emotional distress around bingeing is a core feature. Feeling disgusted with oneself, eating alone out of embarrassment, and eating rapidly until uncomfortably full are all characteristic patterns.
ARFID
Avoidant/restrictive food intake disorder, or ARFID, involves severely limiting the amount or types of food eaten, but not because of concerns about body weight or shape. That distinction separates it from anorexia. Children with ARFID might refuse foods based on texture, smell, taste, or appearance. Adults can have the same sensory aversions or may avoid eating due to a fear of choking, vomiting, or other negative consequences of eating.
ARFID goes well beyond ordinary picky eating. Picky eating targets a handful of foods and doesn’t interfere with a child’s growth or overall nutrition. ARFID, by contrast, can lead to significant weight loss, nutritional deficiencies serious enough to require supplements or tube feeding, and real difficulties in social situations that involve food. It doesn’t resolve on its own the way childhood pickiness typically does.
Rumination Disorder
Rumination disorder is a rare condition in which a person repeatedly brings recently swallowed food back up into the mouth, usually within minutes to two hours after eating. The food is then either rechewed and swallowed again or spit out. This happens after most meals and follows a predictable pattern.
What distinguishes rumination from vomiting is that it’s effortless and painless. There’s no nausea, no retching, and the food doesn’t taste acidic because it hasn’t been in the stomach long enough to mix significantly with digestive acid. The sensation is closer to a belch. In infants, the signs include back arching and sucking noises. The process tends to stop on its own once the regurgitated food starts to taste sour.
Pica
Pica involves persistently eating substances that aren’t food and have no nutritional value, such as dirt, chalk, paper, ice, hair, or paint chips. To qualify as a clinical diagnosis, the behavior needs to last at least a month and be inappropriate for the person’s developmental stage (a toddler briefly mouthing non-food objects wouldn’t count). Pica occurs across age groups but is most commonly identified in children, pregnant women, and people with intellectual disabilities. It can cause serious medical complications depending on what’s being consumed, including intestinal blockages, lead poisoning, and infections.
Other Specified Feeding or Eating Disorders
Other specified feeding or eating disorders (OSFED) is a catch-all category for eating disturbances that cause real clinical distress and impairment but don’t fully meet the criteria for anorexia, bulimia, or BED. It includes five recognized subtypes:
- Atypical anorexia nervosa: All the features of anorexia, including significant weight loss and the intense fear of gaining weight, but the person’s current weight remains within or above the normal range. This is more common than many people realize and can be just as medically dangerous.
- Sub-threshold bulimia nervosa: Binge-purge cycles that occur less frequently or for a shorter duration than the once-a-week-for-three-months threshold.
- Sub-threshold binge eating disorder: Binge eating episodes that don’t meet the full frequency or duration criteria.
- Purging disorder: Regular purging (vomiting, laxatives, excessive exercise) to influence weight or shape, but without binge eating episodes.
- Night eating syndrome: Recurrent episodes of eating after waking from sleep, or excessive food consumption after the evening meal, with full awareness of the eating.
OSFED is not a “mild” diagnosis. People in this category experience the same emotional suffering and physical risks as those with full-threshold eating disorders.
Orthorexia Nervosa
Orthorexia nervosa is not yet recognized as an official diagnosis in any major diagnostic manual, but it’s an increasingly studied pattern of disordered eating. It starts as a focus on eating healthily and gradually becomes a rigid obsession with food quality. People with orthorexia may eliminate entire food groups they perceive as impure or unhealthy, experience significant emotional distress when they break their self-imposed dietary rules, and begin to judge other people based on what they eat.
What separates orthorexia from simply eating well is the degree of fixation and the consequences. Someone with orthorexia may view food exclusively as a source of health rather than pleasure, feel anxious just being near foods they consider unhealthy, and maintain beliefs that their diet is beneficial even as they show signs of malnutrition. The preoccupation can narrow social life, strain relationships, and lead to the same nutritional deficiencies seen in recognized eating disorders.
Who Is Affected
Eating disorders affect people of every age, gender, race, and body size, though prevalence patterns vary. Among adolescents aged 13 to 18, the lifetime prevalence of eating disorders is 2.7%, with girls affected more than twice as often as boys (3.8% vs. 1.5%). In adults, binge eating disorder is the most common, followed by bulimia and anorexia. Women are disproportionately affected across all diagnoses, but rates among men are higher than many people assume, particularly for binge eating disorder.
Eating disorders frequently overlap with depression, anxiety, obsessive-compulsive disorder, and substance use. They are not choices, phases, or lifestyle preferences. They are serious psychiatric conditions with measurable physical consequences, and the standardized mortality risk for anorexia in particular, at nearly six times the general population, places it among the deadliest of all mental illnesses.