Understanding ADHD in Adults

Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental condition that affects the parts of the brain that help us plan, prioritise, focus on, and execute tasks—also known as executive function skills.

Every Person with ADHD is Unique

ADHD presents differently in everyone. While symptoms and intensity vary, the key characteristics include inattentiveness, impulsivity, and hyperactivity.

Estimated UK adults with ADHD3-4%

Core Traits of ADHD

Inattentiveness

Difficulty concentrating, focusing, and maintaining attention on tasks

Hyperactivity

External and internal restlessness, racing thoughts, and mental exhaustion

Impulsiveness

Challenges with impulse control, time management, and decision-making

Emotional Dysregulation & ADHD

Many people with ADHD experience emotions differently to others. Emotional dysregulation—difficulty controlling emotions—affects an estimated 1 in 2 adults with ADHD.

Alongside core traits and emotional dysregulation, people with ADHD can also have other neurodevelopmental conditions and mental health conditions.

Signs of ADHD in Adults

ADHD symptoms can be more difficult to define in adults. As environments and expectations change with adulthood, traits may present differently. Here are common signs:

Attention & Focus

  • Carelessness and lack of attention to detail
  • Inability to focus or prioritise
  • Continually losing or misplacing things
  • Forgetfulness

Impulsivity & Hyperactivity

  • Restlessness and edginess
  • Difficulty keeping quiet
  • Blurting out responses
  • Interrupting others
  • Extreme impatience

Executive Function

  • Starting new tasks before finishing old ones
  • Difficulty with time management
  • Difficulty with sleep
  • Taking risks in activities

Emotional Regulation

  • Mood swings and irritability
  • Emotional dysregulation
  • Quick temper
  • Difficulty coping with stress
  • Rejection sensitivity

Help and Treatment

A range of support is available for adults with ADHD. The ADHD Action Network provides peer support, a network and community where we can learn from each other and improve accessibility and treatment for people with ADHD.

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Diagnosis of ADHD

If you believe you may have undiagnosed ADHD as an adult, talk to your GP first. They may recommend 'watchful waiting' then suggest a referral for an ADHD assessment if appropriate.

Some people recognize ADHD signs but choose not to pursue diagnosis. Support and advice is still available if needed.

NHS ADHD Guide ADHD Aware Assessment Guide

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