Neurodevelopmental conditions
ADHD: Attention-Deficit/Hyperactivity Disorder
A neurodevelopmental condition involving persistent difficulties with attention and/or hyperactivity and impulsivity that cause meaningful impairment.
Attention-deficit/hyperactivity disorder (ADHD) begins in childhood and can continue through adolescence and adulthood. Symptoms vary between people: some mainly experience inattention and executive-function difficulties, while others have prominent hyperactivity or impulsivity, or a combination.
Inattention
Difficulty sustaining attention, organising tasks, following through, remembering responsibilities or managing distractions.
Hyperactivity
Restlessness, difficulty remaining still when expected, excessive activity or an internal sense of being constantly “on the go”.
Impulsivity
Acting or speaking before considering consequences, interrupting, difficulty waiting or making rapid decisions.
Executive-function impact
Problems with planning, prioritising, time management, starting tasks, shifting attention and completing multi-step work.
A specialist assessment considers developmental history, symptoms across different settings, functional impairment, observer information where appropriate and other explanations for attention or behavioural difficulties.
ADHD in children and adolescents
Children may present with academic difficulties, forgetfulness, excessive activity, impulsive behaviour, emotional dysregulation or conflict at home or school. Symptoms should be understood in the context of age and development. Assessment may include information from parents, teachers and other settings.
ADHD in adults
Adults may report chronic disorganisation, procrastination, missed deadlines, poor time management, difficulty sustaining attention, restlessness, impulsive decisions or repeated problems in work and relationships. For adult diagnosis, clinicians look for evidence that characteristic symptoms began during childhood and have persisted.
What else can look like ADHD?
Sleep problems, anxiety, depression, bipolar disorder, substance use, learning difficulties, autism, trauma, thyroid or other medical conditions and medication effects can contribute to attention or behavioural symptoms. Coexisting conditions are also common, so assessment should not assume that every concentration problem is ADHD.
Assessment and treatment
Comprehensive specialist assessment
Diagnosis should be made by an appropriately trained healthcare professional using a full clinical, developmental and psychosocial assessment, with consideration of impairment in more than one important setting.
Environmental and practical adjustments
Structured routines, reducing distractions, written plans, task breakdown, reminders, sleep support and educational or workplace adjustments can reduce impairment and are often part of care.
Psychological and behavioural support
Depending on age and need, support may include ADHD-focused psychoeducation, parent support, behavioural strategies, skills-based psychological treatment and treatment for coexisting anxiety, depression or other conditions.
Medication
Medication can be effective for appropriately diagnosed ADHD and should be initiated and monitored by clinicians with relevant expertise. Treatment choice depends on age, severity, health history, coexisting conditions, goals, benefits and adverse effects.
Adult PsychiatryAssessment for adults with persistent attention and executive-function difficulties.
Psychological TherapiesSupport for behavioural, emotional and functional difficulties.
Preparing for an ADHD assessment
- Bring school reports, previous assessments or developmental information if available.
- Note examples of attention, organisation, impulsivity or restlessness across more than one setting.
- List current medicines, sleep concerns and any coexisting mental-health symptoms.
- For children, information from school or other caregivers may be useful.
Frequently asked questions
Can ADHD first appear in adulthood?
ADHD is a neurodevelopmental condition, so clinicians look for evidence that characteristic symptoms were present during childhood even when the diagnosis is made later.
Does everyone with ADHD need medication?
No. Treatment is individualised and may include environmental adjustments, psychoeducation, psychological or behavioural support and medication when clinically appropriate.
Can anxiety or poor sleep look like ADHD?
Yes. Anxiety, depression, sleep problems, substance use and other medical or neurodevelopmental conditions can contribute to attention difficulties, which is why a comprehensive assessment matters.
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Clinical source
NICE NG87: Attention deficit hyperactivity disorder — diagnosis and management
This information is for general education and does not replace an individual clinical assessment or professional medical advice.
Concerned about attention, impulsivity or hyperactivity?
A proper assessment can distinguish ADHD from other causes and identify the right support.