Serious, common, and treatable
According to the National Institute of Mental Health, eating disorders are serious medical illnesses marked by severe disturbances in eating behaviors and related thoughts and emotions, not lifestyle choices, and not phases. Anorexia nervosa, bulimia nervosa and binge eating disorder are the best known; all three affect every gender, every body size and every age, and all three respond to treatment.
They are also physical illnesses. Hearts, bones, teeth and hormones keep the ledger, which is why good psychiatric care for eating disorders never ignores the body attached to the mind.
The main diagnoses, and what separates them
- Anorexia nervosa: restriction of food intake relative to what the body needs, an intense fear of weight gain, and a self-image distorted by weight and shape. It can involve restriction alone, or restriction with bingeing and purging.
- Bulimia nervosa: repeated episodes of eating an unusually large amount with a sense of lost control, followed by compensating: vomiting, laxatives, fasting or driven exercise. Weight is frequently in the typical range, which is precisely why it hides so well.
- Binge eating disorder: the same loss-of-control episodes, with the same distress and shame, but without regular compensating behaviour. It is the most common eating disorder there is, and the most consistently under-treated.
- Atypical anorexia: every psychological and behavioural feature of anorexia, in someone whose weight is not low, often because they started higher. The medical risks of rapid weight loss and restriction still apply. This diagnosis is missed constantly, and “you don’t look unwell” has delayed a great deal of necessary care.
- ARFID: avoidant/restrictive food intake disorder: severely limited eating driven by sensory aversion, fear of choking or vomiting, or simply no interest in food, without any concern about weight or shape. Common alongside autism and anxiety, and treated differently.
- Rumination and pica, which are less widely known and also real diagnoses.
The essential point: none of these is defined by a number on a scale. Every one of them occurs in people of every body size, every gender and every age.
The warning signs other people can see
Eating disorders are unusually good at hiding, and the person living with one is rarely the first to raise it. What families notice:
- Around food: skipping meals with a reason each time, new rules or eliminated food groups, eating alone, going to the bathroom soon after meals, food disappearing, unusual interest in cooking for others without eating.
- Around the body: frequent weighing, mirror-checking, pinching or measuring, clothes chosen to conceal, distress about photographs.
- Around exercise: a routine that cannot be missed, continues through illness or injury, and is described in terms of earning or undoing.
- Around people: withdrawal from meals out, irritability, low mood, perfectionism sharpening.
- Physically: weight change in either direction, feeling cold, dizziness or fainting, fatigue, hair thinning, dental erosion, gut problems, and periods becoming irregular or stopping.
How eating disorders are diagnosed
By clinical assessment, and always with the body included. A psychiatric evaluation here covers what a day of eating actually looks like, what the rules are and where they came from, whether bingeing or compensating happens and how often, how much of your self-worth is being calculated from weight and shape, and what the whole system is costing you.
It also covers physical health: because these are medical illnesses, and because some of the risk is invisible from the outside. Where blood tests, an ECG or your primary-care doctor’s involvement is indicated, we say so and coordinate rather than duplicate. Anxiety, depression, OCD and trauma are assessed at the same time; they are present far more often than not.
Nobody is weighed as a test of whether they are unwell enough to deserve help.
What causes eating disorders
No single cause, and, this matters, not vanity and not a failure of parenting. What research describes is a combination: genetic vulnerability that runs in families, temperament traits such as perfectionism, anxiety and a strong drive for control, and triggers that push a susceptible person over: dieting itself being the most common one, alongside puberty, transitions, trauma, bullying about weight, and cultural pressure about bodies.
Two consequences worth knowing. First, once restriction has been going for a while, starvation itself produces preoccupation with food, rigidity, low mood and social withdrawal, so some of what looks like personality is physiology, and it improves with nutrition. Second, because the causes are layered, the treatment is too, which is why the plan below rarely has only one part.
How treatment works here
It starts with a psychiatric evaluation that is deliberately unlike the conversations you may be bracing for: no lectures, no meal-plan ambush: an honest map of what food is currently doing in your life, what your body is carrying, and what you want back.
Therapy is the engine. CBT adapted for eating disorders has the strongest evidence for bulimia and binge eating, and works on the rules, the body-checking and the shame spiral, not just the eating. Medication has a real supporting role for some conditions and for the anxiety and depression that so often share the room. Family sessions matter enormously for adolescents, and often for adults too.
And honestly: outpatient care is not always enough. When someone needs medical stabilisation or a structured programme beyond what we provide, we say so early and help make the referral happen, rather than holding on to a patient we are no longer the right setting for.
When to reach out
If food has become a full-time negotiation, or someone who loves you has said the word “worried”, that is enough. You do not need to be at a crisis weight, and you do not need to have decided to change everything. You need one confidential conversation, and that is bookable today.