Causes of anorexia nervosa
We don’t know what causes anorexia nervosa. But there are some factors that can put children and teenagers at higher risk for anorexia nervosa.
These risk factors include:
- being female
- having a certain personality type – being a perfectionist or a high achiever
- thinking in an obsessive way
- having a family history of anorexia nervosa.
Types of anorexia nervosa
There are two main types of anorexia nervosa.
This is the most common type of anorexia nervosa. People with the restricting type of anorexia nervosa limit the amount of food they eat by:
- limiting the number of meals they eat
- reducing the amount of calories they eat
- cutting out certain foods.
Sometimes they might also have obsessive rules about food, like eating only at specific times or from particular plates and bowls.
Binge-eating or purging type
This is when people limit how much they eat and they also binge-eat. Binge-eating is regularly eating too much food, even when you’re not hungry.
Signs and symptoms of anorexia nervosa
Anorexia nervosa is a serious medical condition. It can have physical, psychological and behavioural signs and symptoms.
Physical signs and symptoms of anorexia might include:
- low body weight
- tiredness, weakness and muscle aches
- loss of or irregular menstrual periods
- failure to start puberty
- dizzy spells
- shortness of breath
- heart palpitations
- feelings of cold
- hair loss and thinning.
Psychological signs and symptoms of anorexia might include:
- distorted body image – sometimes people think they’re overweight when they’re not
- preoccupation or obsessive thoughts about food, weight and body shape
- low self-esteem
- mood swings
- depression or anxiety
- withdrawal from family, friends and other social relationships
- refusal to accept that weight is dangerously low even after warnings from family, friends and/or health professionals.
Behavioural signs and symptoms of anorexia might include:
- excessive or compulsive exercise and/or food restriction
- secretive behaviour about eating or exercise
- avoidance of social situations that involve food
- frequent weighing
- aggressive behaviour when forced to eat ‘forbidden foods’
- obsessive behaviour in relation to food preparation and planning.
The long-term consequences of anorexia nervosa can be severe and include:
- problems with the heart and kidneys
- a higher risk of suicide.
What to do if you notice the signs of anorexia nervosa
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.
It’s best to keep your conversations with your child calm and non-judgmental. Emphasise your concerns about your child’s health and wellbeing, not your child’s weight and appearance.
If you’re not sure how to talk with your child about these issues, you could first visit a doctor, dietitian or mental health professional and ask for help. Contacting a support organisation is another option.
Diagnosing anorexia nervosa
There is no single test that can diagnose anorexia nervosa.
If your GP thinks your child might have anorexia nervosa, the GP will talk with your child about eating behaviour, habits and thoughts. The GP will also do a full physical examination and some tests like a blood test, a urine test or an ECG.
The GP might then refer you to a specialist service to confirm your child has anorexia nervosa and recommend appropriate treatment.
Treatments for anorexia nervosa
There’s no single treatment that will work for all cases of anorexia nervosa. Treating anorexia nervosa requires a team of health professionals who have expertise in different areas.
Doctors will prescribe different treatment plans for different children, depending on age, the stage of the illness, the type and severity of the anorexia, the underlying causes and many other factors.
If your child has anorexia nervosa, your child will need psychological therapy.
If possible, it’s very important that the whole family or some family members are involved in your child’s treatment. This is called family-based therapy.
If family-based treatment isn’t possible, other types of therapy might include:
- one-on-one sessions with a psychologist or therapist
- group therapy – working with a group of people who also have eating disorders.
There are no medications proven to treat anorexia nervosa. If your child has depression or anxiety as well as anorexia nervosa, there are some medications that might help treat these conditions.
Sometimes a child with eating disorders needs to go to hospital, but this depends on the child’s weight, symptoms and other health issues.
Your doctor will tell you if your child needs to go to hospital. This can be a very worrying situation for you and your family, but your child might need to go to hospital to be treated for the physical effects of anorexia nervosa.