A compassionate guide for parents navigating changes in their teenager’s eating habits, body image and relationship with food.
Something feels different about your teenager.
Perhaps they’ve started skipping breakfast, avoiding family dinners or suddenly refusing foods they’ve always enjoyed.
Maybe they’re spending more time exercising, checking their appearance in the mirror or talking negatively about their body.
They might have become increasingly interested in ‘healthy eating’, calorie counting or nutrition advice from TikTok.
Or perhaps you’ve noticed changes in their mood. They’re more withdrawn, irritable or anxious, particularly when food is involved.
You may find yourself wondering:
- Is this a normal part of being a teenager?
- Are they just becoming more independent with their food choices?
- Should I be worried about an eating disorder?
- What if I say something and make it worse?
For many parents, these questions can feel overwhelming.
At Myrtle Oak Clinic, we understand how difficult it can be to recognise when changes in eating behaviours may indicate something more concerning.
Eating disorders can develop gradually, and the early warning signs aren’t always obvious.
If your parental instincts are telling you something isn’t quite right, it’s worth seeking guidance. You don’t have to wait until things become more serious.
Eating disorders don’t always look the way you expect
When many people think about eating disorders, they picture someone who is visibly underweight or refusing to eat.
In reality, eating disorders can affect young people of all body shapes, sizes, genders and backgrounds.
A teenager can be experiencing significant distress around food, engaging in harmful eating behaviours or experiencing medical complications while appearing physically healthy.
Some teenagers may continue attending school, achieving good grades, playing sport and maintaining friendships while struggling privately.
Others may experience noticeable changes in their mood, energy levels, relationships or daily routines.
Eating disorders can involve restrictive eating, binge eating, compensatory behaviours, intense anxiety about food, body image concerns or significant difficulty eating enough to meet nutritional needs.
Some eating disorders, including Avoidant/Restrictive Food Intake Disorder (ARFID), may develop without concerns about weight or body shape.
This is why recognising changes in behaviour and emotional wellbeing can be so important.
8 early warning signs of an eating disorder in teenagers
Every teenager is different, and experiencing one of these signs doesn’t automatically mean your child has an eating disorder.
However, patterns of change, increasing rigidity or distress around food deserve attention.
1. Suddenly cutting out foods or entire food groups
Your teenager may announce they’re no longer eating carbohydrates, dairy, sugar, fats or certain processed foods.
They might describe foods as ‘clean’, ‘bad’, ‘unhealthy’ or ‘fattening’.
Sometimes these changes begin with what appears to be a genuine interest in nutrition or health.
Over time, you may notice the number of foods they feel comfortable eating becomes increasingly limited.
They may also become distressed when their preferred foods aren’t available or when meals are prepared differently than expected.
What to look for: Increasingly rigid food rules, anxiety about ingredients, avoidance of previously enjoyed foods or distress when eating routines change.
2. Skipping meals or making excuses to avoid eating
You might hear:
- “I’m not hungry.”
- “I already ate at school.”
- “I’ll eat later.”
- “My stomach feels funny.”
- “I’m trying intermittent fasting.”
Occasionally missing a meal can happen for many reasons. However, repeated meal skipping or consistently finding ways to avoid eating may indicate a developing concern.
Some teenagers may start eating alone, avoiding family meals or becoming uncomfortable eating in front of others.
What to look for: Frequent meal avoidance, eating less than usual, secrecy around food or increasing discomfort during shared meals.
3. Becoming preoccupied with weight, shape or appearance
It’s common for teenagers to become more aware of their appearance as their bodies change during puberty.
However, persistent distress about weight or body shape can be an early warning sign.
Your teenager might frequently criticise their appearance, compare themselves with others or express a strong desire to change their body.
They may spend increasing amounts of time checking mirrors, weighing themselves, measuring body parts or seeking reassurance about their appearance.
Others may begin avoiding mirrors, photographs, particular clothing or social activities because of how they feel about their body.
What to look for: Increasing body dissatisfaction, frequent body checking, distress about weight changes or self-worth becoming closely connected to appearance.
4. Exercise becoming increasingly rigid or compulsive
Sport and movement can be positive parts of teenage life.
However, exercise may become concerning when it is driven by guilt, anxiety or a perceived need to compensate for eating.
You might notice your teenager becoming distressed when they miss a workout, exercising despite illness or injury, or feeling they must earn their food through physical activity.
They may also begin prioritising exercise over rest, friendships, school commitments or family activities.
What to look for: Exercise becoming inflexible, distress when unable to exercise or movement being closely linked to calorie burning and weight control.
5. Changes in mood, personality or social behaviour
Sometimes the first changes parents notice have little to do with food.
Your teenager may become more irritable, anxious, withdrawn or emotionally sensitive.
Family meals may become a source of conflict.
They might avoid birthday parties, sleepovers, restaurants or other social occasions where food is involved.
You may also notice difficulties concentrating, increased fatigue or a decline in their usual enjoyment of activities.
Eating disorders can significantly affect emotional wellbeing and relationships, and inadequate nutrition can further influence mood and cognitive functioning.
What to look for: Increasing isolation, heightened anxiety around meals, changes in mood or withdrawing from previously enjoyed activities.
6. Becoming intensely focused on nutrition information or social media advice
Your teenager may start following influencers who promote restrictive eating, weight loss challenges, fasting, body transformation programs or strict food rules.
They might begin tracking calories, comparing meals with online content or following detailed eating plans that aren’t appropriate for their age or nutritional needs.
Some young people become highly knowledgeable about nutrition terminology while simultaneously developing increasingly restrictive eating patterns.
This can make conversations difficult, particularly when they feel confident that the information they’re following is correct.
What to look for: Rigid adherence to online diet advice, distress when unable to follow food rules or increasing preoccupation with calories, ingredients and body-related content.
7. Changes in eating patterns that feel secretive or difficult to discuss
Eating disorders can involve a range of behaviours, including restriction, binge eating, purging or other compensatory behaviours.
Some teenagers may eat unusually large amounts of food while experiencing a sense of loss of control.
Others may become secretive about eating, hide food or show signs of significant distress or guilt after meals.
You may notice frequent bathroom visits after eating, unexplained food packaging or an increasing reluctance to discuss eating habits.
These behaviours can be associated with significant emotional distress and, in some circumstances, serious medical risks.
What to look for: Secrecy, loss of control around eating, guilt or shame after meals, or behaviours intended to compensate for eating.
8. Physical changes or signs their body may not be receiving enough nutrition
Eating disorders can affect physical health even when weight changes are minimal or absent.
Possible warning signs include:
- Feeling dizzy, faint or unusually tired.
- Feeling cold frequently.
- Difficulty concentrating.
- Changes in menstrual periods, where applicable.
- Digestive complaints such as constipation or bloating.
- Changes in growth or weight trajectory.
- Reduced sporting performance or slower recovery.
- Sleep disturbances.
These symptoms can have many possible causes and should be medically assessed.
Importantly, a teenager does not need to be underweight to experience serious medical complications from an eating disorder.
For a broader look at what parents often notice, see our guide to 10 early warning signs of an eating disorder every parent should know.
“But they’re eating healthier.” When healthy habits become concerning
One of the reasons eating disorders can be difficult to identify early is that some behaviours are initially praised.
A teenager who starts exercising regularly, avoiding certain foods or becoming interested in nutrition may receive positive feedback from family, friends or social media.
They might even be complimented on changes in their appearance.
However, the motivation behind these behaviours and the distress associated with them are important considerations.
For example, a teenager choosing a balanced lunch because they enjoy it and find it satisfying is different from a teenager who becomes extremely anxious when they cannot eat a meal that follows strict rules.
Similarly, enjoying sport is different from feeling compelled to exercise regardless of exhaustion, injury or illness.
A helpful question for parents is: “Is my teenager becoming more flexible and confident around food, or more anxious, restricted and controlled by it?”
Increasing fear, rigidity or distress can be a reason to seek professional support.
What should I say if I’m worried about my teenager?
Starting a conversation about food, weight or body image can feel daunting.
You may worry that raising your concerns will embarrass your teenager, cause conflict or make them withdraw further.
However, approaching the conversation with curiosity, compassion and a focus on wellbeing can help.
Consider choosing a quiet moment away from mealtimes when neither of you is feeling rushed or overwhelmed.
You might say:
“I’ve noticed that eating seems to be causing you some stress lately, and I’m wondering how you’re feeling about things.”
Or:
“I’ve noticed you’ve been avoiding some of the foods you used to enjoy. I’m concerned about how you’re going, and I’d really like to understand what’s happening.”
Or simply:
“I care about you, and I’ve noticed a few changes that make me think you might be having a difficult time. I’d like us to get some support together.”
Try to focus on how your teenager is feeling and functioning rather than their weight, appearance or the amount of food on their plate.
Listen without judgement, avoid debating individual food choices and reassure them that they deserve support.
Your teenager may initially dismiss your concerns or insist that everything is fine.
This can be difficult, particularly when you feel worried.
You can continue to approach them with compassion while also taking appropriate steps to seek professional guidance.
You don’t need your teenager to agree that they have a problem before you seek advice about your concerns.
For more ideas, read our guide on how to talk to your teen about an eating disorder.
What if my teenager refuses to see someone?
It’s understandable for teenagers to feel nervous, embarrassed or resistant when a parent suggests professional support.
They may feel their eating habits are under control, worry about being judged or fear that someone will make them change behaviours that currently feel important to them.
Rather than making the conversation about a diagnosis, it can help to explain that the appointment is an opportunity to understand what’s happening and receive support.
You might describe it as speaking with someone who understands teenagers, food, body image and the challenges of growing up.
If your teenager remains reluctant, parents can still seek professional advice about how to respond and what steps to take next.
A GP can also assess their physical health and help coordinate appropriate care.
Where an eating disorder is suspected, timely assessment is important, even if your teenager is unsure about engaging in treatment.
How Myrtle Oak Clinic supports teenagers and families
At Myrtle Oak Clinic, our multidisciplinary team includes psychologists and Accredited Practising Dietitians with experience supporting people experiencing eating disorders, disordered eating and challenges with their relationship with food.
We understand that eating difficulties can affect the whole family.
Parents may feel frightened, frustrated, confused or unsure how to help.
Teenagers may feel overwhelmed, ashamed, misunderstood or anxious about changes to their eating habits.
Our approach is compassionate, evidence-informed and tailored to each young person’s needs.
Working together as a team
Eating disorders can affect physical health, psychological wellbeing, family relationships and everyday functioning.
A coordinated approach can help address these interconnected needs.
Our psychologists and dietitians can work collaboratively with the young person, their family, GP and other treating professionals to support consistent and appropriate care.
We recognise the important role parents and carers can play in helping teenagers recover.
Our aim is to support the young person while also helping their family feel more informed, confident and equipped throughout the process.
You don’t need to wait for a crisis to ask for help
One of the most important things we want parents to understand is that early intervention matters.
Eating disorders can become increasingly entrenched over time, and identifying concerns early can improve the opportunity for effective treatment and recovery.
If you’re worried about your teenager’s relationship with food, changes in their eating habits or distress about their body, seeking professional advice is a positive first step.
A GP can assess your teenager’s medical health, including any immediate risks, and help determine appropriate referrals.
You can also contact Myrtle Oak Clinic to discuss the services available and how our team may be able to support your family.
If your teenager is fainting, experiencing chest pain, showing signs of significant dehydration, rapidly deteriorating or otherwise medically unwell, seek urgent medical assessment.
Trust your instincts. Your teenager deserves support.
You know your teenager in a way that no one else does.
You notice the small changes. The meals they stop eating. The conversations they avoid. The moments when they seem less like themselves.
Sometimes those changes are part of navigating adolescence.
Sometimes they’re signs that your teenager needs additional support.
You don’t have to figure out which it is on your own.
Seeking guidance early can help your teenager feel understood, supported and connected with the right care.
At Myrtle Oak Clinic, we believe every young person deserves a compassionate, respectful and individualised approach to their relationship with food, their body and their mental health.
We’re here to support teenagers and their families through these challenges, with the goal of helping young people move towards recovery, wellbeing and a more positive relationship with food.
Concerned about your teenager? We’re here to help.
If you’ve noticed changes in your teenager’s eating habits, body image, mood or relationship with food, our team can help you explore the next steps.
Myrtle Oak Clinic offers psychology and dietetic services for people experiencing eating disorders, disordered eating and related concerns.
Our team provides support through our Tuggerah and Broadmeadow clinics, with telehealth options where clinically appropriate.
Book an appointment or contact Myrtle Oak Clinic to find out how we can support your teenager and family.
