In mental health, ED stands for eating disorder, a group of psychiatric conditions defined by persistent, harmful patterns of eating behavior that damage both physical and psychological well-being. Eating disorders affect roughly 2% to 7% of women and up to 1% of men, though those numbers likely undercount people who never seek treatment. These are not lifestyle choices or phases. They are serious mental illnesses with biological roots, and anorexia nervosa carries one of the highest mortality rates of any psychiatric condition.
The Main Types of Eating Disorders
The current diagnostic manual recognizes several distinct eating disorders, each with different patterns and risks.
Anorexia nervosa involves extreme restriction of food intake driven by an intense fear of gaining weight. People with anorexia often perceive themselves as overweight even when dangerously thin. It comes in two forms: a restricting type, where calorie intake is severely limited, and a binge-eating/purging type, where restriction alternates with episodes of bingeing or purging. The physical toll is severe. Irregular heart rhythms, low blood pressure, dehydration, and heart failure are all documented complications. A meta-analysis of 36 studies covering over 12,000 patients found that people with anorexia die at nearly six times the expected rate for their age, with suicide being a particularly common cause of death. Only about 46% of patients fully recover, while roughly 20% remain chronically ill long-term.
Bulimia nervosa is characterized by repeated episodes of eating large quantities of food in a short period, typically under two hours, followed by compensatory behaviors meant to prevent weight gain. These behaviors include self-induced vomiting, laxative or diuretic misuse, fasting, or excessive exercise. The cycle feels out of control during the binge and is followed by intense shame. Physically, repeated vomiting erodes tooth enamel as stomach acid washes over teeth, causes swelling of the salivary glands near the jaw, and depletes potassium levels. Low potassium is particularly dangerous because it disrupts heart rhythm and can be fatal.
Binge eating disorder (BED) is the most commonly missed. It shares the binge episodes of bulimia, eating far more than most people would in a similar timeframe with a feeling of total loss of control, but without the purging that follows. To meet diagnostic criteria, binge episodes must occur at least once a week for three months and involve at least three hallmark behaviors: eating unusually fast, eating past the point of physical comfort, eating large amounts when not hungry, eating alone out of embarrassment, or feeling disgusted or deeply guilty afterward. The key distinction from occasional overeating is the consistent pattern and the marked distress that comes with it.
Lesser-Known Eating Disorders
Avoidant/restrictive food intake disorder (ARFID) looks very different from anorexia because it has nothing to do with body image or fear of weight gain. People with ARFID restrict what or how much they eat because of sensory sensitivities (certain textures or tastes trigger extreme disgust), a lack of interest in food, or a specific fear like choking or vomiting. A child who chokes on bread and then becomes terrified of solid foods, losing significant weight, would fit this profile. So would a teenager with lifelong selective eating so severe it causes vitamin deficiencies and makes it impossible to eat at restaurants or social gatherings. ARFID can be diagnosed at any age, not just in childhood.
Other specified feeding or eating disorder (OSFED) is a catch-all category for presentations that cause real suffering and impairment but don’t check every box for the conditions above. This includes atypical anorexia, where someone has all the psychological and behavioral features of anorexia but hasn’t reached a clinically low weight. It also includes purging disorder without binge eating, night eating syndrome, and cases of bulimia or binge eating that occur less frequently than the diagnostic thresholds require. OSFED is not a “mild” diagnosis. The distress and medical risks can be just as significant.
What Causes Eating Disorders
No single factor causes an eating disorder. Genetics play a meaningful role, with research showing these conditions run in families. At the brain level, eating disorder behaviors appear to hijack the reward system. Research from the National Institutes of Health found that behaviors like extreme restriction or bingeing alter how the brain’s dopamine signaling responds to food. Essentially, the disordered behavior changes the brain’s expectation and reward circuitry in ways that reinforce the eating disorder, making it harder to stop even when someone wants to.
Psychological vulnerability matters too. Over 50% of people diagnosed with an eating disorder already had a psychiatric diagnosis in the year before their eating disorder was identified. The overlap is staggering: in one analysis of 2,400 women hospitalized for eating disorders, 94% had a co-occurring mood disorder, 56% had an anxiety disorder, and 22% had a substance use disorder. Generalized anxiety, PTSD, and specific phobias all occur at higher rates in people with eating disorders than in the general population. These conditions don’t simply coexist by coincidence. They share underlying vulnerabilities and often feed into each other.
Behavioral Warning Signs
Eating disorders often develop gradually, and the earliest signs are behavioral rather than physical. Someone may start cutting out entire food groups, eating only at specific times, or developing rituals around meals like cutting food into tiny pieces or chewing excessively. Compulsive exercise after eating, frequent trips to the bathroom during or right after meals, and hiding or throwing away food are all red flags. Social withdrawal is common, particularly avoiding situations that involve eating with others. Eating in secret, wearing loose clothing to disguise weight changes, and becoming unusually rigid or anxious about food choices are patterns worth paying attention to, especially in adolescents.
How Eating Disorders Are Treated
Treatment depends on the type of eating disorder, the person’s age, and the severity of physical complications.
For adolescents with anorexia, family-based treatment (FBT) has the strongest research backing. In this approach, parents take an active role in managing their child’s eating and weight restoration, with the therapist coaching the family through the process. It’s effective, but the reality is sobering: over half of adolescents who complete FBT are still not fully recovered a year later. That doesn’t mean treatment failed. It means recovery is often a longer road than families expect, and additional treatment may be needed.
For bulimia and binge eating disorder, a specialized form of cognitive behavioral therapy called CBT-E is considered the front-line treatment for adults. It targets the thought patterns and behaviors that maintain the eating disorder. The results are meaningful: in one study of adolescents and young adults with bulimia, binge eating, or related conditions, about 68% had minimal eating disorder symptoms by the end of treatment, and half of those who were bingeing or purging at the start had stopped entirely. For anorexia specifically, roughly 63% of those who completed CBT-E reached both a healthy weight and normal levels of eating-related distress.
Dialectical behavior therapy (DBT) is sometimes used as an alternative, particularly for people whose eating disorder is closely tied to difficulty managing intense emotions. When FBT isn’t feasible, whether because of family dynamics, the patient’s age, or other factors, CBT and DBT offer meaningful paths forward. Treatment often involves a team that includes a therapist, a physician monitoring physical health, and sometimes a dietitian, with the level of care ranging from outpatient sessions to residential programs depending on medical stability.