Signs of anxiety in teenagers: what parents need to know

Your teenager has been quieter lately. Maybe they've stopped going out with friends, or they're suddenly refusing to do things they used to enjoy. Maybe their stomach hurts every Sunday night, or they're picking fights over what seems like nothing. You're trying to work out whether this is normal teenage change, hormones, social pressure, or something more. You're not overreacting by asking the question, and you're definitely not alone in asking it.

The quick answer: what are the early signs of anxiety in teenagers?

The earliest signs of anxiety in teenagers are usually changes in behaviour rather than direct emotional disclosure. Watch for: avoidance of situations they used to handle (school, sleepovers, social events), physical complaints with no medical cause (headaches, stomach aches, fatigue), sleep changes, irritability that's out of character, perfectionism that's becoming distressing, and withdrawal from friendships. Teenagers often don't say "I'm anxious". They show it through what they stop doing, what they over-control, and what their body starts protesting. If these patterns persist for more than a few weeks and are affecting their daily life, school, or relationships, it's worth talking to a psychologist.

How common is anxiety in Australian teenagers?

Australian research shows anxiety disorders are among the most common mental health conditions in young people. Many more teenagers experience significant anxiety symptoms that fall short of formal diagnosis but still impact their lives. Anxiety disorders were far more common among 16 to 24 year olds in 2020–22 than in 2007 (Teesson et al., 2024). So if you're worried your teenager is anxious, you're observing something that's affecting a lot of families right now.

The good news is that there are well-researched psychological treatments for anxiety in teenagers, and you don't need to wait until things are severe to get support.

The signs parents most often miss

Teenage anxiety rarely looks like the stereotype of a worried, hand-wringing kid. Adolescents have more cognitive sophistication than younger children and more emotional armour than adults, which means anxiety often hides behind other behaviours.

Avoidance dressed up as something else

A teenager who's anxious about a class presentation might call in sick on the day. A teen anxious about social rejection might suddenly say their old friends are "boring" or "toxic" and stop seeing them. Avoidance is often the loudest sign of anxiety, but parents read it as laziness, attitude, or moodiness.

Physical symptoms with no medical cause

Anxiety lives in the body. Teenagers may report:

• Headaches, particularly on school days or before stressful events
• Stomach aches, nausea, or unexplained gut issues
• Difficulty falling asleep or staying asleep
• Heart racing or feeling short of breath
• Constant tiredness without obvious cause

These warrant a GP check first to rule out medical causes. When investigations come back clear, anxiety is a common explanation for persistent physical symptoms in adolescents.

Perfectionism that's gone too far

A teenager who's spending hours on homework that should take 30 minutes, redoing assignments compulsively, or melting down over an A- isn't being conscientious. They're often anxious. The same applies to teenagers who can't tolerate making mistakes in sport, performance, or social settings.

Anger and irritability

Anxiety in teenagers often expresses itself as anger because anger feels more tolerable than fear. Snapping at parents, slamming doors, fighting with siblings, and short temper are not always defiance. They can be a teenager who's overwhelmed and out of regulatory capacity.

Reassurance-seeking that doesn't work

A teen who keeps asking "are you sure I'll be okay?" or "do you promise nothing bad will happen?" and isn't satisfied by your answers is showing one of the clearest patterns of anxiety. Reassurance temporarily soothes but never resolves.

Normal teenage stress vs anxiety that needs support

Adolescence is genuinely stressful. Hormonal shifts, changing brains, school pressure, peer dynamics, identity questions, and the relentless social comparison of online life all create real stress that doesn't necessarily mean a mental health condition.

Some useful markers for distinguishing normal teenage stress from anxiety that warrants professional support:

• Duration: Stress that resolves once a specific stressor passes (an exam, a friendship rupture, a sports try-out) is typical. Anxiety persists for weeks or months and isn't tied to one identifiable trigger.
• Intensity: Mild worry that doesn't disrupt daily functioning is part of growing up. Anxiety that prevents your teenager from doing things they used to do, or causes significant distress, is different.
• Pervasiveness: Stress about one specific issue is normal. Anxiety that has spread across multiple areas (school, friendships, family, future, body image, sleep) suggests a broader pattern.
• Recovery: Healthy teenage stress eases with rest, weekend recovery, or a good chat with a friend. Anxiety doesn't bounce back the same way.

What causes anxiety in teenagers?

Anxiety in adolescence usually has multiple contributing factors rather than a single cause. Common ones include:

• Genetic and temperamental predisposition: anxiety runs in families, and some kids are wired with a more sensitive nervous system from birth
• School and academic pressure: HSC, NAPLAN, scholarships, and the increasing intensity of academic competition
• Social media and comparison: constant exposure to peers' curated lives, body comparison, and exclusion that can be observed in real time
• Sleep deprivation: chronic short sleep is both a cause and a symptom of teenage anxiety
• Family stress: parental separation, financial pressure, illness in the family
• Bullying, including online
• Significant transitions: changing schools, moving suburbs, starting Year 11 or 12
• Trauma or difficult life experiences
• Co-occurring neurodevelopmental conditions: undiagnosed ADHD or autism in teenagers often presents alongside anxiety, particularly in girls who mask

This last point matters. Sometimes undiagnosed ADHD or autism is part of the picture. Treating the anxiety alone won't resolve things if the underlying neurodevelopmental piece isn't recognised.

How we approach this at Unbound Minds

Working with anxious teenagers requires a different approach than working with children or adults. Adolescents need to feel respected, taken seriously, and in control of the process. They will not engage with a therapist who treats them like a kid or talks over their head to their parents.

Our approach with anxious teens centres on three things.

First, we build a real relationship. The first one or two sessions are about understanding your teenager's world from their perspective: their friendships, their interests, what's actually been happening, what they think is going on. This isn't filler. Trust and rapport matter for everything that follows.

Second, we use evidence-based approaches, mainly Cognitive Behavioural Therapy and acceptance and commitment-based work, adapted for adolescents. CBT for anxiety in teenagers has strong research support. We help your teen recognise anxious thinking patterns, learn to tolerate uncertainty, and gradually face avoided situations rather than working around them. We integrate practical skills for sleep, stress regulation, and social pressure.

Third, we work with you as the parent. Parents are not the problem in teenage anxiety, but parents are powerful allies in recovery. We provide structured guidance on how to respond to anxious behaviour at home in ways that build resilience rather than accommodate avoidance. This is often the missing piece in treatment.

For younger children with anxiety, our toolkit for parents and children walks through approaches more suited to that age group.

When to seek psychology support

Some practical thresholds for seeking professional support for your teenager:

• Anxiety symptoms have lasted more than four weeks
• School attendance, friendships, or family life is being affected
• They're avoiding things that matter to them, not just things they don't enjoy
• Sleep is consistently disrupted
• Physical complaints (headaches, stomach aches) are persistent and medical causes have been ruled out
• They've expressed feeling hopeless, worthless, or that life isn't worth it
• They've started self-harming or talking about it
• You sense something is wrong, even if you can't quite name it

That last one matters. Parents notice changes in their kids before anyone else. If your gut is telling you something needs attention, that's worth acting on, even if you can't articulate exactly why.

If your teenager is having thoughts of self-harm or suicide, please contact Kids Helpline on 1800 55 1800 or Lifeline on 13 11 14 immediately, or attend your nearest emergency department.

Unbound Minds offers psychology services for teenagers and young adults experiencing anxiety. We see clients at our two clinics, Kingswood (Nepean Health Hub) and Gledswood Hills (Gregory Hills Health and Business Centre), and by telehealth across NSW. Families come to us from St Marys, Glenmore Park, Jordan Springs, Cranebrook, Emu Plains and nearby suburbs. Our anxiety treatment for young people page outlines what to expect when starting therapy.

Not sure how to broach the conversation with your teen? Our piece on what to expect at your first psychology session can be a useful read for them too, to demystify what therapy actually looks like.

Frequently asked questions

What are the first signs of anxiety in teenagers?

Early signs are usually behavioural rather than emotional: avoidance of situations they used to handle, physical complaints (headaches, stomach aches), sleep changes, irritability, perfectionism, and withdrawal from friendships. Teenagers rarely say "I'm anxious". They show it through what they stop doing and how their body starts protesting.

Is it normal for teenagers to have anxiety?

Some level of stress and worry is part of normal teenage development. However, Australian research shows anxiety disorders are among the most common mental health conditions in young people. Anxiety becomes a concern when it persists for weeks, affects daily functioning, or distresses your teenager noticeably.

How can I tell if my teenager has anxiety or is just stressed?

Stress tends to be tied to a specific issue and resolves once that issue passes. Anxiety persists, spreads across multiple areas of life, and doesn't ease with normal recovery. If your teen's worry is preventing them from doing things they used to do, or has lasted more than a few weeks, that's beyond ordinary stress.

What causes anxiety in teenagers?

Multiple factors usually contribute: genetic predisposition, temperament, academic pressure, social media, sleep deprivation, family stressors, bullying, transitions, trauma, and undiagnosed neurodevelopmental conditions like ADHD or autism. There's rarely one single cause, and a thorough assessment helps clarify what's contributing for your teenager specifically.

Should I take my teenager to a psychologist for anxiety?

If symptoms have lasted more than a few weeks, are affecting school, friendships, or family life, or your teenager is distressed by them, seeing a psychologist is a sensible step. You don't need to wait until things are severe.

How is teenage anxiety treated?

A well-researched treatment is Cognitive Behavioural Therapy adapted for adolescents, often combined with parent guidance and skills for sleep, stress regulation, and gradual exposure to avoided situations. The number of sessions varies from teenager to teenager. Your psychologist will talk through a realistic plan with you after the first few sessions. Medication may be considered alongside therapy for some teenagers, in consultation with a GP or psychiatrist.