Understanding the reasons behind certain behaviours can be the first step towards better communication, greater confidence and stronger relationships, whether at work, at home or within a support setting.
However, when someone is fidgety, forgetful or struggles to sit still and follow instructions, it can be easy to interpret these behaviours as laziness, carelessness or a lack of effort. Without taking the time to understand what might be happening beneath the surface, we risk making assumptions that overlook the person’s underlying needs.
In this blog, we explore why behaviours associated with ADHD (attention deficit hyperactivity disorder) can sometimes be mistaken for ‘bad behaviour’. We also consider what those supporting someone with these difficulties, or people who recognise these patterns in themselves, can do if they begin to wonder whether there is more to the story.
Behaviour is communication, but it isn’t the whole story
One useful way to understand behaviour is to picture an iceberg. Organisations such as Family Action use this approach to explore the relationship between behaviour and ADHD.
What we see on the surface, such as snapping at someone, struggling to sit still or reacting strongly to something that may seem insignificant, represents only the visible tip of the iceberg. Beneath the surface, there may be factors we cannot immediately see, including tiredness, sensory overload, anxiety or difficulties with attention and impulse control.
Many adults, particularly those who have never had the words to describe their experiences, may find it difficult to explain what they are feeling or why they are struggling. Instead, these difficulties may become apparent through their behaviour.
This does not mean that every challenging moment has a clinical explanation. However, responding with curiosity rather than immediately assuming that someone is being deliberately difficult can be a more constructive starting point.
What does ADHD look like?
ADHD is a recognised neurodevelopmental condition, not a personality type or character flaw, despite common misconceptions.
According to the NHS guidance on ADHD in adults, symptoms generally fall into two broad categories:
Inattentiveness: This can include difficulty concentrating, being easily distracted, losing things, struggling to follow instructions or complete tasks, and appearing forgetful in everyday situations.
Hyperactivity and impulsivity: This can include frequent fidgeting, difficulty remaining seated, talking excessively, interrupting others and acting impulsively.
Some people experience predominantly inattentive symptoms, while others experience more hyperactive and impulsive symptoms. Many experience a combination of both.
For an ADHD diagnosis to be considered, the NHS and NICE guideline NG87 explain that symptoms must have begun in childhood, even if they were not recognised or diagnosed at the time. They must also be more pronounced than would typically be expected, occur across different settings, such as home and work, and have a significant impact on everyday life.
It is important to remember that many people experience some of these behaviours from time to time, particularly when they are overtired, anxious or going through a period of change. This does not automatically mean they have ADHD.
The distinction lies in the pattern, severity and impact of the difficulties, which is why an assessment by an appropriately qualified professional is essential.
Why is ADHD mistaken for ‘bad behaviour’?
ADHD is not always immediately apparent to others. Unlike a physical injury, such as a broken bone, there is no scan or blood test that can identify ADHD in the same way. Instead, an assessment considers patterns of symptoms, their impact on everyday life and how they present across different settings.
Without this wider context, behaviours such as interrupting conversations, forgetting instructions or struggling to sit still can be interpreted as deliberate choices rather than difficulties that a person may be struggling to manage.
ADHD can go unrecognised, particularly in women
Women are more likely to have their ADHD symptoms overlooked or recognised later in life.
NICE guidance highlights that ADHD is thought to be under-recognised in girls and women, who may be less likely to be referred for assessment and more likely to remain undiagnosed.
One contributing factor is that inattentive symptoms can be less noticeable than more visibly hyperactive or impulsive behaviours.
As a result, someone who struggles with concentration, organisation or everyday tasks may go unnoticed for years, sometimes well into adulthood, without understanding why these difficulties persist.
ADHD can present differently in different people
ADHD does not look the same in everyone.
For example, one person may be constantly on the move, frequently interrupt conversations or struggle to sit through a meeting. Another may appear quiet but regularly miss deadlines, lose belongings or lose track of conversations.
The second person may attract less attention because their difficulties are less visible, even though these challenges can still have a significant impact on their everyday life.
Criticism alone may not address the underlying difficulties
When someone repeatedly forgets instructions, interrupts others or struggles to manage their behaviour, it can be tempting to respond with criticism and expect them to make a different choice next time.
However, if these difficulties are connected to attention, impulsivity or organisation, simply telling someone to ‘try harder’ may not address what they are struggling with.
Clear expectations, consistent routines and appropriate support can be more constructive than relying on criticism alone.
Emotional regulation can also play a role
According to information from NHS Dorset’s neurodiversity resource, emotional regulation can also form part of the wider picture for some people with ADHD.
Although ADHD is primarily associated with difficulties involving attention, hyperactivity and impulsivity, some people also find it challenging to regulate their emotions.
This can contribute to intense emotional reactions, particularly when someone feels frustrated or overwhelmed. However, difficulties with emotional regulation are not, on their own, evidence of ADHD.
For those providing support, understanding this possibility can make it easier to recognise when a person may be struggling, rather than simply interpreting their response as deliberately difficult.
Why does understanding ADHD matter in the UK?
Understanding ADHD and its symptoms is particularly important given the growing demand for assessment and support across England.
According to NHS England’s ADHD Management Information for August 2026, an estimated 2.48 million people in England have ADHD, including those who have not received a formal diagnosis.
In June 2026, there were up to 959,662 open referrals that may have related to an ADHD assessment. These figures represent referrals rather than confirmed diagnoses or necessarily unique individuals.
The House of Commons Library has also highlighted the challenges surrounding access to ADHD assessments, including lengthy waiting times.
At the same time, research using primary care records suggests that the number of recorded ADHD diagnoses in England remains below estimated prevalence. This indicates that some people experiencing ADHD-related symptoms and difficulties may not yet have received a formal diagnosis.
While recognition and assessment can take time, behaviours associated with ADHD may be criticised, misunderstood or labelled long before the reasons behind them are fully understood.
However, not everyone who displays behaviours associated with ADHD will have the condition.
NICE guidance makes clear that diagnosis requires a full clinical and psychosocial assessment by an appropriately trained specialist. This assessment considers symptoms, their impact and how they present across different settings.
A checklist, a single observation or the opinion of a family member, friend or employer cannot establish a diagnosis on its own.
Shifting from reacting to understanding
Not every challenging moment needs to be explained by a diagnosis. However, it is worth pausing before automatically attributing someone’s actions to ‘bad behaviour’.
Organisations such as the ADHD Foundation and Family Action provide guidance that can help people better understand and support those experiencing ADHD-related difficulties.
Whether you are supporting someone else or recognising these patterns in yourself, a few practical approaches may help.
- Look beneath the behaviour. Consider what the behaviour might be communicating. Could the person be tired, overwhelmed or struggling to transition between tasks? Looking beyond what is immediately visible can help identify potential triggers and unmet needs.
- Keep instructions clear and manageable. Short, straightforward instructions can be easier to process than lengthy explanations or several requests at once. Where possible, provide one step at a time and check that the person understands what is expected of them.
- Establish consistent routines. Agree on a small number of clear expectations and routines, keeping them as consistent and predictable as possible. This can help create a greater sense of structure and make it easier for someone to understand what is expected of them.
- Use specific, positive feedback. Rather than focusing only on what has gone wrong, recognise and acknowledge what someone is doing well. For example, saying, ‘Thank you for completing that before the deadline’, provides clear feedback and reinforces positive actions.
- Remain calm and consistent. When difficulties arise, responding calmly can help prevent a situation from escalating. Where consequences are appropriate, they should be clear, proportionate and fair, rather than driven by frustration.
These approaches are not exclusive to ADHD. They can benefit many people, particularly those who find emotions, transitions or attention difficult to manage.
The aim is not to excuse every behaviour, but to respond in a way that recognises the person’s needs while maintaining appropriate expectations and boundaries.
When should you seek support?
If difficulties with attention, organisation, impulsivity or behaviour are consistently affecting everyday life, relationships or work, it may be worth speaking to a GP.
A GP can discuss the symptoms, consider other possible explanations and advise on the most appropriate next steps, including whether a referral for an ADHD assessment may be suitable.
In England, eligible patients may also be able to access an ADHD assessment through the NHS Right to Choose pathway. This allows patients to request referral to an alternative NHS-funded provider where the relevant criteria are met.
Availability, eligibility and waiting times vary between providers, so it is important to check the options available.
Organisations such as ADHD UK and the ADHD Foundation also provide guidance for adults who are considering an assessment, waiting for one or navigating life after diagnosis.
Support from employers, family members and other professionals can also make a valuable difference, even before a formal diagnosis is received.
Seeking support is not about rushing to apply a label. It is about ensuring that someone is not left trying to manage complex difficulties without the understanding and support they need.
Whether or not ADHD is ultimately identified as the explanation, approaching behaviour with curiosity rather than judgement can create more opportunities for understanding, improve communication and strengthen relationships at home and at work.
Looking beyond the labels allows us to see the person, understand their needs and consider how best to support them.
