Resources

ADHD ADHD in Children ADHD in Teenagers Assessments & Diagnosis

What Are the Signs of ADHD in Teenagers? A Helpful Guide for Parents Considering an ADHD Assessment

27th October 2025

Teenage years bring new challenges, including academic pressure, social dynamics, and growing independence.

For some young people, these changes highlight characteristics of behaviour that may indicate Attention Deficit Hyperactivity Disorder (ADHD). Understanding the signs can help parents have discussions with their teen to decide whether an ADHD assessment is needed.

Why Recognising ADHD in Teenagers Matters

ADHD is a neurodevelopmental condition that affects attention, impulse control, and activity levels.

Identifying ADHD in teenagers is important because untreated symptoms can impact school performance, friendships, and emotional wellbeing. Early support can make a significant difference.

Common Signs of ADHD in Teenagers

ADHD symptoms in adolescents often look different from those in younger children. Here are some signs to watch for:

Inattentive Behaviours

Difficulty concentrating on homework or lessons.

Frequently losing items like books or sports kit.

Forgetting deadlines or appointments.

Struggling to follow multi-step instructions.

Hyperactive Behaviours

Restlessness or fidgeting even when seated.

Talking excessively or interrupting conversations.

Difficulty engaging in quiet activities.

Impulsive Behaviours

Acting without thinking (e.g., risky behaviour, sharing comments before thinking).

Struggling to wait their turn in social or classroom settings.

Emotional outbursts or frustration when things don’t go as planned.

An Important Note To Consider

Teenagers naturally seek independence and may show mood swings or distractibility.

ADHD is considered when these behaviours are persistent, occur in multiple settings, and significantly impact daily life.

UK NICE guidelines recommend assessment when symptoms interfere with education or relationships.

When Should You Consider an ADHD Assessment?

If your teenager’s behaviour affects school performance or social interactions, speak to your GP or school SENCO.

They may refer you to a paediatrician or specialist for assessment. UK ADHD assessments involve developmental history, observation, and input from parents and teachers.

Practical Steps for Parents

Keep Records: Note patterns and triggers over time.

Work with the School: Share concerns with teachers and SEN staff.

Seek Professional Advice: Contact your GP for referral options, or you may wish to work with a private assessment centre for a often quicker route to diagnosis.

Take the First Step Today

Autism Anglia offers a free online screening test to help you decide whether a full ADHD assessment might be right for your child.

It’s fast, easy to follow and helps the people who we support make informed decisions on their next steps.

Take the free screening test now by clicking the button below and start your journey towards clarity and support.

Take our FREE screening test today

You’re not alone in this journey. Whether you’re seeking answers for yourself or your child, Autism Anglia is here to support you every step of the way.