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Anxiety in Children and Teens: Signs, Causes and How a Child Psychologist Can Help

Every child feels worried from time to time. A nervous stomach before a school camp, tears at drop-off in the first week of Kindergarten, a few restless nights before a big test. These moments are a normal part of growing up.

But for some children and teenagers, worry stops being occasional and starts running the show. It can shape what they’re willing to try, where they’re willing to go, and how they feel about themselves. If that sounds familiar, you’re not alone, and it isn’t a sign that you’ve done anything wrong.

This guide explains what anxiety in children can look like, why it develops, and how a child psychologist can help your child (and your family) feel calmer and more confident.

Key Takeaways

•         Anxiety is a normal human emotion, but it can become a difficulty when it is intense, long-lasting, and gets in the way of everyday life
•         Anxiety in children doesn’t always look like worry. It can show up as irritability, meltdowns, avoidance, or physical complaints
•         Anxiety is common and very treatable, especially with early support
•         Cognitive Behavioural Therapy (CBT) with gradual, supported exposure to feared situations is the best-supported approach for child anxiety
•         Parents play a key role. Small changes in how we respond at home can make a big difference
•         Autistic children, children with ADHD, and children with learning difficulties are more likely to experience anxiety, so neurodiversity-affirming support matters

What Is Anxiety in Children?

Anxiety is the body’s alarm system. When we sense a threat, our heart rate rises, our muscles tense, and our mind scans for danger. This is helpful when the danger is real, like a car coming towards us.

With an anxiety difficulty, the alarm goes off too often or too loudly, even when the situation is safe. A child might feel genuinely frightened by something that adults see as manageable, like speaking in class, sleeping in their own room, or going to a birthday party.

It’s important to know that a child who is anxious isn’t being dramatic, manipulative, or difficult. Their body is telling them they’re in danger, and the fear feels very real to them.

Common Signs of Anxiety in Children and Teens

Anxiety looks different at different ages, and many children can’t put their feelings into words. Instead, you may notice changes in their body, behaviour, or mood.

Area	What you might see
Emotions	Frequent worry, tearfulness, irritability, anger, or seeming “on edge”
Body	Stomach aches, headaches, nausea, racing heart, tiredness, or trouble sleeping
Behaviour	Avoiding school, activities, or social situations; clinginess; needing lots of reassurance; meltdowns or shutdowns
Thinking	“What if” thoughts, perfectionism, fear of making mistakes, difficulty concentrating
Sleep	Trouble falling asleep, nightmares, wanting a parent close at bedtime

A child who looks “angry” or “oppositional” may actually be frightened. Anger and avoidance are very common ways that anxiety shows itself, especially in children who can’t yet explain what they feel.

Common Types of Anxiety in Children

Psychologists usually describe a few main patterns. Children can experience more than one.

•         Separation anxiety: intense distress when away from parents or caregivers, often with fears that something bad will happen to them
•         Generalised anxiety: ongoing worry about many things, such as schoolwork, health, friendships, or the future
•         Social anxiety: strong fear of being judged, embarrassed, or left out, which can lead to avoiding speaking up or joining in
•         Specific fears or phobias: intense fear of particular things, like animals, vomiting, storms, or medical procedures
•         Panic: sudden waves of intense physical fear, more commonly seen in older children and teenagers

A formal diagnosis isn’t always needed to start getting help. What matters most is how much the anxiety is affecting your child’s day-to-day life.

When Is Worry “Normal”, and When Is It Time to Seek Support?

Some worry is part of healthy development. It may be time to talk to a psychologist if:

•         The worry has lasted for several weeks or months
•         It is affecting school attendance, friendships, sleep, or family life
•         Your child is avoiding more and more things they used to manage
•         Physical symptoms keep showing up with no medical explanation
•         Your child is distressed, and the things you’ve tried at home haven’t helped

If you’re unsure, trust your instincts. You know your child best. Early support often means shorter, simpler treatment.

Why Do Some Children Develop Anxiety?

There is rarely one single cause. Anxiety usually develops from a mix of factors, including:

•         Family history: anxiety can be genetic and can run in families, through both genes and learned patterns
•         Life stress or change: moving house, changing schools, illness, family changes, or friendship difficulties
•         Neurodivergence: autistic children and children with ADHD experience anxiety more often, often linked to sensory overwhelm, social demands, unpredictability, or years of masking
•         Learning difficulties: ongoing struggles at school can build worry and a fear of failure

None of this is anyone’s fault. Understanding the “why” helps us choose the right kind of support.

What Helps? Evidence-Informed Support for Child Anxiety

The good news is that anxiety responds well to treatment. A child psychologist can help by:

Building understanding. Children learn, in age-appropriate ways, what anxiety is, what happens in their body, and why it isn’t dangerous, even when it feels awful.

Teaching coping skills. These might include calming strategies, noticing and challenging unhelpful thoughts, and problem-solving.

Gradual, supported exposure. Avoidance keeps anxiety going, because the child never gets to learn that they can cope. In Cognitive Behavioural Therapy (CBT), children take small, planned steps towards the things they fear, at a pace that feels manageable. Over time, the fear reduces and confidence grows.

Involving parents. Especially for younger children, parents are an important part of therapy. We help families respond in ways that are supportive without accidentally feeding the anxiety.

Working with school. When anxiety shows up in the classroom, we can collaborate with teachers and school staff to put practical supports in place.

Adapting for neurodivergent children. For autistic children and children with ADHD, therapy works best when it respects how they process the world. This might mean using visuals, concrete language, special interests, and sensory-friendly strategies.

How Parents Can Help at Home

Your love and steadiness are powerful. Some practical starting points:

•         Validate the feeling without feeding the fear. “I can see this feels really scary. I know you can handle it, and I’m right here.”
•         Gently encourage, don’t force. Support small steps towards what your child is avoiding, rather than removing the challenge entirely
•         Be mindful of over-accommodating. Helping in the moment feels kind, but always rescuing a child from a feared situation can make anxiety stronger in the long run
•         Limit repeated reassurance. Answering the same worry over and over can become a cycle. A psychologist can help you find a balance
•         Protect sleep, routine, and downtime. Tired, overloaded children are more vulnerable to anxiety
•         Notice and celebrate bravery. “I saw you try that even though you were nervous. That took courage.”
•         Look after yourself too. Children take cues from our own calm, so your wellbeing matters

Frequently Asked Questions

Will my child grow out of anxiety? 

Some children do, but for many, anxiety continues or returns during times of stress if it isn’t addressed. Learning skills early gives children tools they can carry into adolescence and adulthood.

Is it okay to let my child avoid things that make them anxious? 

Short-term, avoidance brings relief. Long-term, it usually makes anxiety grow. A psychologist can help you decide when to support a break and when to gently encourage a step forward.

Do all children with anxiety need medication? 

No. Psychological therapy such as CBT is a first-line approach for many children. If medication is ever being considered, this is a decision made with your child’s GP, paediatrician, or psychiatrist.

Can anxiety be a sign of autism or ADHD? 

Anxiety can occur on its own or alongside other differences. If you’ve noticed other traits, such as sensory sensitivities, difficulty with change, or trouble with attention, a thorough assessment can help make sense of the full picture. You can read more in our guides on autism assessment for children in Sydney and AuADHD and PDA in children.

Can telehealth work for child anxiety?

Yes. Many families find telehealth a comfortable option, especially for children who feel safest at home, and for families across New South Wales.

Getting Support for Your Child in Sydney

If your child’s worries are getting in the way of daily life, reaching out is a positive and caring step. With the right support, children can learn that anxiety is something they can understand, manage, and move through.

At Sydney Child Psychology Services (SCPS), our registered child psychologists provide evidence-based, neurodiversity-affirming assessment and therapy for children and adolescents at our Croydon Park clinic in Sydney’s inner west, with telehealth appointments available across New South Wales.

SCPS is not an emergency or crisis service. If you or your child are in crisis, please contact Lifeline on 13 11 14 or Kids Helpline on 1800 55 1800. In an emergency, call 000.