Your teen has stopped joining family dinners. They seem more anxious, more private and more critical of themselves. Maybe someone has even praised them for "eating so healthy." It can be hard to know whether you're seeing a phase or something more serious. This guide explains the signs of an eating disorder in teenagers that parents might notice, why they're easy to miss, how to bring it up gently and how counselling helps teens and families.
This post is general information, not a diagnosis or a treatment plan. It isn't a checklist or a score. Only a qualified professional can say whether your teen has an eating disorder.
Why eating disorders in teens are easy to miss
The U.S. National Institute of Mental Health (NIMH) describes eating disorders as serious illnesses, not a choice. NIMH also notes that they can affect people of all ages, racial and ethnic backgrounds, body weights and sexes, and that even people who appear healthy can have an eating disorder and be very ill.
That means you can't tell by looking. A teen of any size, and of any gender, can be struggling. Eating disorders also tend to come with secrecy and shame, so teens may work hard to hide what's happening. And some early changes can look like healthy habits from the outside, which is why they're easy to praise rather than question.
Early signs of eating disorder in teens: changes around meals
Some of the early signs of eating disorder in teens show up around mealtimes and food in general. You might notice your teen:
avoiding family meals or eating alone more often
seeming anxious, tense or upset around meals
following new, rigid rules about eating
being secretive or defensive about eating
spending a lot of time thinking or talking about food
On their own, any one of these can have other explanations. What matters is a pattern that's growing, or that comes with distress.
Body talk, exercise and appearance
NIMH notes that some people become fixated on weight, body shape or controlling what they eat. At home, this might look like frequent negative comments about their body, comparing themselves to others, checking their appearance often, wearing clothes to hide their body or a pull toward exercise that seems driven and anxious rather than fun.
Mood, withdrawal and family life
Eating disorders often travel with other struggles. NIMH notes that people with eating disorders are at higher risk for depression and anxiety. You might see more irritability, perfectionism, pulling away from friends, dropping activities or seeming low. A teen who used to be easygoing may become rigid or very self-critical.
Physical signs, in one line
NIMH notes that eating disorders can affect the whole body over time, including the heart, and can be life-threatening, which is why physical changes always deserve attention. If your teen faints, seems confused or seems physically unwell, treat it as urgent and call 911.
Signs of eating disorder in teen girl and teen boy
Parents often search for signs of eating disorder in teen girl or signs of eating disorder in teen boy, wondering whether they differ. NIMH is clear that eating disorders affect people of all sexes. Beyond that, we haven't found a reliable source that splits the warning signs by gender, so the signs in this post apply to any teen.
Don't let a stereotype stop you. If you're worried about your son, your daughter or any teen, trust that worry.
Eating disorder warning signs parents shouldn't wait on
Eating disorder warning signs parents should take seriously include:
changes that keep growing over weeks
distress, panic or anger when routines around eating are disrupted
withdrawing from friends, family or activities they used to enjoy
talk of feeling worthless, out of control or hopeless
If you see several of these together, it's worth reaching out for support, even if you're not sure. You don't need to be certain to ask for help.
A diet or something more?
Teens experiment, and many care about their health and appearance. A useful question isn't "Is my teen eating right?" but "Is this taking over?" Signs of an eating disorder in teens tend to involve fear, rigidity, secrecy and distress that grow over time, rather than a single choice or a single meal.
How to talk to your teen about an eating disorder
Knowing how to talk to your teen about an eating disorder can feel daunting. A few ideas:
Choose a calm, private moment. Not at a meal and not in the middle of a conflict.
Lead with care. "I've noticed you seem really stressed lately, and I'm worried about you."
Focus on feelings, not food or weight. Talk about what you've seen in their mood and life.
Listen without arguing. They may deny it or get upset. That's common, and it's okay to try again later.
Avoid comments about bodies, theirs or anyone else's, including praise for weight changes.
Make it clear you're on their side and that you'll figure out next steps together.
What not to say
Try to avoid:
"Just eat."
"You don't look sick."
"You look so much better now."
blaming, threatening or bargaining around food
These can increase shame and make a teen hide more.
If your teen says no
Your teen may push back at first. They may say you're overreacting, get angry or promise to "fix it" themselves. That reaction is understandable, and it doesn't mean the conversation failed. Stay calm, keep the door open and let them know you'll keep checking in because you care. You can also reach out for guidance yourself, even before your teen agrees to go. Parents often find it helpful to have a plan and a place to talk through their worries.
Look after yourself too
Worrying about your child is exhausting. You might feel scared, guilty or unsure whether you've done something wrong. NIMH notes that research points to a combination of genetic, biological, behavioural, psychological and social factors that can raise a person's risk. In other words, eating disorders are not caused by one thing or one person, and blaming yourself won't help your teen. What helps is noticing, staying close and getting support. Lean on people you trust, protect some time to rest and remember that getting support for yourself is part of supporting them.
How counselling helps teens and families
Eating disorders can be treated, and NIMH notes that families can play a crucial role, with research suggesting family-based treatment can improve outcomes, particularly for adolescents.
In counselling, a therapist helps your teen understand what the eating disorder is doing for them, cope with difficult emotions in other ways and build a kinder relationship with their body. Parents can be involved, so you learn how to support recovery at home.
We offer eating disorder counselling and teen counselling at every office. Our posts on teen therapy in Ottawa and teen therapy in Cambridge explain what teen sessions look like. Child and teen counselling is available for ages 6 and up, along with family therapy.
Getting support
We offer counselling in person in Waterloo, Kitchener, Cambridge and Ottawa, and online anywhere in Ontario on a secure, encrypted video platform.
Sessions with our therapists range from $130 to $200, depending on the clinician.
Depending on your plan, insurance may cover some or all of the cost. Coverage varies, so check your plan.
We can direct bill many insurers, including for sessions with a Registered Psychotherapist (Qualifying). Desjardins is the exception: through TELUS eClaims, we can direct bill Desjardins for sessions with an RSW, RP or psychologist, but not for an RP (Qualifying).
Book a free 15-minute consultation with our admin team to talk through what you're seeing.
If you're in crisis: if your teen faints or seems physically unwell, or anyone is in immediate danger, call 911. If you or your teen is thinking about suicide or self-harm, call or text 9-8-8 any time.
Last reviewed: October 2026
Sources
Eating Disorders: What You Need to Know, National Institute of Mental Health (NIMH)
Eating Disorders, National Institute of Mental Health (NIMH)