Understanding Eating Disorders in Teenagers: A Guide for Parents

More Than a Difficult Phase

Eating disorders are among the most serious mental health conditions in terms of mortality: anorexia nervosa has one of the highest death rates of any psychiatric illness. They are also among the most misunderstood. They are not diets gone wrong, not attention-seeking, and not something a young person can simply decide to stop. They are serious conditions with complex psychological roots that require professional treatment and compassionate family support.

Around 1.25 million people in the UK have an eating disorder at any given time. They affect people of all genders, though they are more commonly identified in girls and young women, partly because they genuinely are more prevalent in this group and partly because boys and young men are significantly under-diagnosed. They occur across all socioeconomic groups, ethnicities, and body types.

Types of Eating Disorder

Anorexia nervosa involves severely restricting food intake, intense fear of gaining weight, and a distorted perception of body size and shape. It is associated with dangerously low body weight but can be present in people of any weight, which is one reason it is missed. Physical consequences include loss of bone density, cardiovascular complications, hormonal disruption, and in severe cases organ failure.

Bulimia nervosa involves cycles of binge eating followed by purging, most commonly through vomiting, laxative use, or excessive exercise. It often occurs at a normal body weight, which means it is frequently undetected. Physical consequences include damage to teeth from stomach acid, electrolyte imbalances that affect heart function, and oesophageal damage.

Binge Eating Disorder involves recurrent episodes of eating large quantities of food without compensatory purging, accompanied by significant distress, shame, and loss of control. It is the most common eating disorder in the UK and is consistently underdiagnosed.

ARFID (Avoidant Restrictive Food Intake Disorder) involves severely limited food intake not driven by body image concerns but by sensory sensitivity, fear of choking or vomiting, or extreme food selectivity. It is more common in younger children and in those with autism or anxiety conditions.

Warning Signs to Watch For

Early recognition significantly improves treatment outcomes. Warning signs vary by disorder but common indicators include marked changes in eating behaviour (skipping meals, cutting out food groups, eating very slowly or in rituals, avoiding eating with others), frequent trips to the bathroom after meals, significant weight change in either direction, preoccupation with food, calories, or body image that seems excessive, wearing loose clothing to hide body shape, excessive exercise particularly when unwell or in bad weather, and fatigue, dizziness, or other physical symptoms without clear cause.

Emotional and behavioural changes can also be significant: withdrawal from social situations involving food, increased secrecy around eating and exercise, heightened anxiety around mealtimes, irritability, and perfectionism. Not all of these signs indicate an eating disorder, but a pattern of changes across several areas warrants attention.

How to Raise the Subject

Raising concerns about a young person's eating is one of the most delicate conversations a parent can have. Framing it around health, energy, or concern for their wellbeing is more effective than commenting on their body or weight. Comment on what you have noticed rather than what you think it means: I've noticed you haven't been eating much with us lately and I'm worried about you is very different from I think you have an eating problem.

Avoid commenting on food and body in general family conversation as a matter of principle. Diet talk, complimenting weight loss, and commenting on others' bodies are all environmental factors that can strengthen the thought patterns associated with eating disorders. A family culture that is neutral about bodies and food is a protective one.

If you are worried, do not wait for certainty before speaking to your GP. Eating disorders respond far better to early intervention than to late. A GP can carry out an initial assessment and make a referral to CAMHS or specialist eating disorder services. BEAT, the UK's eating disorder charity, also provides a helpline (0808 801 0677) and a detailed guide for parents on recognising and responding to eating disorders.

Supporting Recovery at Home

Recovery from an eating disorder is a long process that typically involves professional support including psychological therapy, nutritional support, and sometimes medical monitoring. For parents, the most important role is to maintain a warm, consistent presence without making food the focus of every interaction.

Family-Based Treatment (FBT) is an evidence-based approach for adolescent anorexia that involves parents taking a lead role in re-nourishing and supporting their child, with professional guidance. If your child's treatment team recommends this approach, access training and support through BEAT and through the treatment service.

Be patient with setbacks. Eating disorder recovery is rarely linear. What sustains it over time is an environment of acceptance, low food commentary, and consistent unconditional love. Seek your own support too: parenting a child through an eating disorder is emotionally demanding, and your wellbeing matters both for its own sake and for your capacity to support your child.