By Raising Children Network, with the Centre for Adolescent Health
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Dieting is one of the strongest risk factors for developing an eating disorder.
Eating disorders and disordered eating are serious medical and psychological problems. If you’re worried about your child’s eating habits, there are some red flags for eating disorders that you can look out for. There are also ways to get help for your child.

What are eating disorders and disordered eating?

Eating disorders are serious mental illnesses.

The most common eating disorders are:

  • anorexia nervosa, which is when someone tries to keep their weight as low as possible
  • bulimia nervosa, which is when someone eats large amounts of food and then gets rid of the food – for example, by vomiting or using laxatives
  • binge-eating disorder, which is when someone needs to overeat but doesn’t need to get rid of the food.

Disordered eating is behaviour that isn​’t quite as severe or regular as the behaviour in anorexia nervosa, bulimia nervosa or binge-eating disorder.

But disordered eating can be just as medically and psychologically serious as the other eating disorders, and it needs treatment too. Someone with disordered eating might also be at risk of developing an eating disorder.

Although girls are most at risk of eating disorders, boys can also develop them. Boys sometimes go untreated for longer because parents and health professionals aren’t looking for body image and eating problems in boys.

Red flags for eating disorders

If you notice that your child has changed eating habits, mood and behaviour – particularly in relation to food – you need to talk with your child and a health professional as soon as you can.

The conversations should be calm and non-judgmental. Emphasise that you’re concerned about your child’s health and wellbeing, not your child’s weight and appearance.

Food and eating habits
You might notice that your child:

  • prepares food for others, but doesn’t eat it
  • cuts down on portion sizes or shows other signs of highly limited eating and dieting
  • cuts out ‘junk food’, and then cuts out major food groups such as meat or dairy
  • loses weight or goes up and down in weight – note that someone doesn’t have to be ‘thin’ to have an eating disorder (in fact, rapid weight loss in overweight teenagers can be a sign of an eating disorder).

You might notice that your child seems anxious or irritable, particularly around mealtimes.

You might notice that your child:

  • avoids social activities, particularly ones that involve food
  • goes to the bathroom or toilet straight after meals
  • vomits or uses laxatives
  • exercises too much, particularly while alone in the bedroom.

Friends, teachers or coaches might tell you that something isn’t right with your child.

You should also be concerned if you notice changes in your child’s body that are signs of weight loss, decreased body fat and poor nutrition. These might include:

  • irregular periods in your daughter, or periods stopping altogether
  • your child feeling tired or lacking energy all the time
  • your child seeming to be cold all the time, even in warm weather
  • your child complaining of feeling faint or dizzy, tired or constipated
  • soft downy hair growing on your child’s face, arms or torso
  • hair loss from your child’s head.

Other signs such as swollen or puffy cheeks, damaged teeth or gums, and sores on the knuckles or hands can be a sign that teenagers are making themselves vomit. 

Talking to your child about disordered eating and eating disorders

If you think that something just isn’t right about the way your child is eating or behaving around food, trust your judgment and talk to your child.

This could be a tricky conversation. You might feel really worried, and your child might get angry and say that there isn’t a problem. Even if this happens, try to stay calm and focus on your concerns about your child’s health. Say that you think your child needs an assessment with a health professional.

You need to very careful when you talk with your child about food, weight and body image.

If you’re not sure how to talk about these issues, you could first visit a doctor, dietitian or mental health professional and ask for help. Contacting a support organisation listed below is another option.

Getting help for eating disorders

Seeking an early assessment and opinion from a health professional is a really good idea.

Early intervention for disordered eating can stop problem eating turning into a full-blown eating disorder. Also, it might be easier to get your child to see a health professional now than further down the track. If you step in early, you might be able save your child from intensive treatment and a very long recovery time.

If you’re worried about your child’s eating habits, it’s a good idea to take your child to see a GP, dietitian or mental health professional as soon as you can. If possible, try to find a health professional who has experience in eating disorders.

A doctor can refer your child to a specialist eating disorders service if needed. 

Why teenagers can be at risk of eating problems and eating disorders

Adolescence can be a risky time for teenagers treating their bodies in unhealthy ways, as well as for eating problems, disordered eating and eating disorders.

During adolescence, your child’s body and brain grow and develop very quickly. There are lots of changes going on in the way your child thinks, feels and relates to people. Many teenagers are more aware of their body image, and become worried about their shape and size. 

At the same time, your child needs more of the right kinds of food to support growth and development. Because teenagers are growing so much, it can be harder to keep up with their nutritional needs.

Lifestyle and food habits might change as your child begins to eat more meals and snacks away from home.

And this is also a time when young people are more aware of and influenced by media messages and information at school about health, obesity and dieting.

So you might notice some changes in your child’s eating habits and attitudes towards food, including:

  • eating at random times and/or skipping meals
  • eating more convenience foods and high-energy sugary snacks, including soft drinks and alcohol
  • being more aware of media information about ‘healthy’ eating, obesity and diets
  • experimenting with dieting and restrictive eating – that is, not eating certain foods or food groups.

The combination of all these things can lead some teenagers to start diets or develop eating habits that aren’t good for their growing bodies.

Other risk factors for eating disorders

We can’t link eating disorders to a particular gene, environment or personality type. But there are some factors that can make someone more at risk for developing an eating disorder. 

These risk factors include:

We don’t know exactly why some children and teenagers develop eating disorders. But we do know that it’s not your fault. If your child has an eating disorder, your love and support will be very important in helping your child get better.

State and territory eating disorders support services

For adolescent eating disorders support services in your state, contact either your specialist children’s hospital or a state-based service listed below.

Australian Capital Territory

New South Wales


South Australia



Western Australia


  • Neumark-Sztainer, D. (2005). I’m Like, So Fat. New York: Guildford Press.
  • Last updated or reviewed 13-05-2015
  • Acknowledgements This article was developed in collaboration with the Centre for Adolescent Health, The Royal Children’s Hospital, Melbourne.