ADHD is often associated with behaviours that are easy to spot, such as being unable to sit still, frequently interrupting or struggling to concentrate. But ADHD does not always look this obvious from the outside.

Some people become very good at hiding their difficulties or finding ways to compensate. This is often described as ADHD masking, and it can be one reason why ADHD goes unrecognised until adulthood.

What is ADHD masking?

Masking describes attempts to hide, control or compensate for traits associated with ADHD in order to meet the expectations of other people or a particular environment.

It can be deliberate, but it is not always something a person consciously decides to do. Over many years, coping strategies can simply become part of everyday life.

Someone who struggles with organisation, for example, might rely heavily on reminders, lists and rigid routines. A person who regularly loses track of conversations may consciously make an effort to appear attentive. Others might spend much longer preparing for tasks than colleagues realise, or repeatedly check their work because they are worried about making mistakes.

From the outside, these strategies can make someone appear organised and in control. The amount of effort required to maintain that appearance is much less visible.

Why can ADHD be missed during childhood?

ADHD symptoms begin during childhood, but that does not mean they are always recognised at the time.

Not every child with ADHD is noticeably hyperactive or disruptive. Difficulties with attention, organisation or completing tasks can be less obvious, particularly if a child performs well academically or has plenty of structure and support around them.

Some children also develop their own ways of managing difficulties. They may work particularly hard, copy their peers’ behaviour, or become perfectionistic about schoolwork.

This can mean the difficulties are attributed to personality, stress or simply being forgetful rather than prompting further investigation.

Why might things change in adulthood?

Leaving school, starting university, building a career or managing a household can remove some of the structure that previously helped someone cope.

Suddenly, there are more competing demands to manage independently: appointments, deadlines, finances, relationships, and everyday responsibilities. Strategies that worked at school may no longer be enough.

For some people, this is when longstanding difficulties with attention, organisation or impulsivity become much harder to ignore. It may also be the point at which they first consider an ADHD assessment to understand whether ADHD could be contributing to the difficulties they have experienced.

This does not mean ADHD has suddenly developed in adulthood. Instead, existing difficulties may have become harder to compensate for or more noticeable as circumstances have changed.

The hidden effort behind masking

Masking can make it hard for others to appreciate how much someone is struggling.

For example, a person may meet every deadline at work, but only by working late into the evening. Someone may rarely forget an appointment because they use several alarms and repeatedly check their calendar throughout the day.

These strategies can be useful, but maintaining them can also require considerable effort.

The NHS England independent ADHD Taskforce notes that some neurodivergent people consciously or unconsciously minimise or hide differences to appear neurotypical, and that masking can delay recognition while also being emotionally and physically exhausting.

Recognising difficulties is not the same as diagnosing ADHD

Reading about masking can sometimes make past experiences feel familiar. However, struggling with concentration, organisation or restlessness does not automatically mean someone has ADHD.

Similar difficulties can occur for many reasons, which is why ADHD cannot be established from a checklist or individual symptom alone.

If difficulties are persistent and affect work, education, relationships, or everyday life, speaking to an appropriate healthcare professional can help identify what may be contributing.

For some adults, seeking professional advice is the first time they’ve considered the effort involved in managing everyday tasks alongside the difficulties themselves. Whether or not ADHD is identified, understanding why those difficulties occur can be an important step towards finding appropriate support.

David Radar, a psychology graduate from the University of Hertfordshire, has a keen interest in the fields of mental health, wellness, and lifestyle.