ADHD Symptoms in Adults & Children UK
ADHD symptoms vary significantly between individuals and between adults and children. Many adults are not diagnosed until later in life because their symptoms present differently to the hyperactive child stereotype.
ADHD symptoms in adults
In adults, ADHD often presents as chronic disorganisation, difficulty starting or completing tasks, poor time awareness, impulsive decision-making, emotional dysregulation, and relationship difficulties. Hyperactivity in adults is often internal — a racing mind rather than physical restlessness.
ADHD symptoms in children
In children, symptoms include difficulty sitting still, excessive talking, difficulty waiting their turn, frequent careless mistakes, losing things repeatedly, and difficulty sustaining attention on tasks. Symptoms must be present in more than one setting (e.g. home and school) and cause significant impairment.
Inattentive, hyperactive, and combined presentations
DSM-5 recognises three presentations of ADHD: predominantly inattentive (formerly "ADD"), predominantly hyperactive-impulsive, and combined presentation. The inattentive presentation is commonly missed, particularly in women and girls, as it does not involve the disruptive behaviour associated with the hyperactive type.
When to seek an assessment
If ADHD symptoms are significantly affecting your work, relationships, education, or daily functioning, and you have experienced them since childhood, seeking a formal assessment is worth considering. A formal diagnosis opens the door to appropriate treatment and workplace/educational accommodations.
Frequently asked questions
Can you have ADHD without being hyperactive?
Yes. The inattentive presentation of ADHD does not include significant hyperactivity. It presents primarily as difficulty sustaining attention, poor working memory, and disorganisation. This presentation is often missed because it is less disruptive.
Is ADHD a disability in the UK?
ADHD can qualify as a disability under the Equality Act 2010 if it has a substantial and long-term adverse effect on your ability to carry out day-to-day activities. This means your employer and educational institution must make reasonable adjustments.