ADHD

📖 Overview

ADHD is a neurodevelopmental condition affecting how the brain regulates attention, impulse control, and executive function. It is not a problem with intelligence or willpower. The ADHD brain is not broken — it is wired differently, and that wiring comes with both significant challenges and genuine strengths.

THE THREE PRESENTATIONS

Inattentive ADHD (formerly ADD)
Inattentive ADHD involves difficulty sustaining focus, being easily distracted, losing things, forgetting instructions, and appearing to daydream. It does not involve significant hyperactivity. This presentation is the most commonly missed — particularly in girls and women — because the person is not disruptive. They are often described as bright but scattered, not reaching their potential, or away with the fairies. Decades of undiagnosed inattentive ADHD are common.

Hyperactive-Impulsive ADHD
Hyperactive-impulsive ADHD involves restlessness, fidgeting, difficulty staying seated, talking excessively, interrupting, acting without thinking, and difficulty waiting. This is the presentation most people picture when they think of ADHD. It is more commonly identified in boys and in childhood.

Combined ADHD
Combined ADHD involves features of both inattentive and hyperactive-impulsive presentations. It is the most common diagnosis in adults.

EXECUTIVE FUNCTION
Executive function is the set of mental processes that manage planning, organising, starting tasks, switching between tasks, managing emotions, and monitoring behaviour. ADHD is fundamentally an executive function difference.

This means: knowing what needs to be done and being unable to start it (task initiation deficit), losing track of time and arriving late despite trying (time blindness), having seventeen tabs open and completing none of them, forgetting things the moment they are out of sight, and struggling to move from one task to another without significant friction.

Executive function difficulties are not visible. From the outside they look like laziness, disorganisation, and poor attitude. From the inside they feel like trying to drive with the handbrake on.

THE INTEREST-BASED NERVOUS SYSTEM
The ADHD brain does not activate for tasks based on importance or obligation — it activates based on interest, challenge, novelty, urgency, and passion. This is not a choice. It is a neurological regulation difference.

This means: a person with ADHD can hyperfocus for hours on something genuinely engaging while being completely unable to start a routine task that will take fifteen minutes. The hyperfocus is not controllable — it can be as disruptive as inattention. Missing meals, sleep, and deadlines because of hyperfocus is a real ADHD experience.

REJECTION SENSITIVE DYSPHORIA
Rejection Sensitive Dysphoria (RSD) is an intense emotional response to perceived rejection, criticism, failure, or teasing. It is not listed in diagnostic criteria but is recognised by many ADHD specialists as a central feature of ADHD experience.

RSD involves: feeling devastated by what others experience as mild criticism, interpreting neutral comments as disapproval, avoiding trying things to avoid the possibility of failure, and emotional responses that feel completely disproportionate to the situation but are genuinely experienced as overwhelming.

RSD is one of the most impairing aspects of ADHD for many adults. It affects relationships, work, and self-esteem profoundly.

TIME BLINDNESS
People with ADHD experience time differently. There are often only two time states: now and not now. Future events — even important ones — exist in a vague not now until they are imminent. This is why ADHD looks like poor planning and chronic lateness even in people who genuinely try.

Time blindness also means: underestimating how long tasks take, losing track of time during engaging activities, and experiencing the past as distant and the future as abstract in ways that make learning from experience and planning ahead genuinely harder.

ADHD IN WOMEN AND GIRLS
ADHD in women and girls is significantly underdiagnosed. Girls are more likely to present with inattentive ADHD, more likely to mask and internalise difficulties, more likely to develop anxiety and depression as secondary conditions, and less likely to be referred for assessment.

Hormonal fluctuations across the menstrual cycle, pregnancy, and menopause significantly affect ADHD symptoms — this is increasingly recognised but still poorly understood and poorly supported by most services.

Many women receive an ADHD diagnosis in their thirties, forties, or fifties — often following a child's diagnosis, a life crisis, or reading about ADHD and recognising every single item on the list.

ADHD AND EMOTIONAL REGULATION
Emotional dysregulation is central to ADHD but often overlooked in diagnostic criteria. ADHD involves feelings that arrive fast, feel intense, and are hard to manage. Frustration, excitement, boredom, and distress all feel bigger. Recovery from emotional flooding takes longer.

This is not a personality problem. It is a neurological feature of ADHD that responds to the same interventions as other ADHD symptoms.

ADHD AND CO-OCCURRING CONDITIONS
ADHD rarely occurs alone. The most common co-occurring conditions are: autism (present in a significant proportion of people with ADHD), dyslexia, dyspraxia, anxiety (often secondary to years of struggling and failing), depression (again often secondary), and sleep disorders.

Treating anxiety or depression without identifying underlying ADHD often gives limited results. The ADHD is the engine driving much of the distress.