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Think you’re just disorganised? 10 signs your forgetfulness could be adult ADHD

Think you’re just disorganised? 10 signs your forgetfulness could be adult ADHD

Constantly losing things or missing appointments? These everyday struggles could be signs of adult ADHD, not just being a busy parent.

Frustrated mother failing her responsibilities due to bad memory

MadeForMums team

Published: January 6, 2026 at 11:19 AM

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Are you at a point where your life is feeling overwhelming because you just can't keep on top of your belongings, appointments and tasks?

Perhaps you regularly find yourself halfway to work only to realise you have forgotten your laptop again, or you miss a dentist appointment even though you set yourself three reminders? For years, these moments might be brushed off as being busy, disorganised or just part of parent life.

But for many adults, especially women, persistent forgetfulness and overwhelm can be signs of Attention Deficit Hyperactivity Disorder, or ADHD – a neurodevelopmental condition that affects focus, organisation, emotional regulation and memory.

Around 4% of people in the UK are thought to have ADHD, which equals up to 2.2 million adults. Assessments have risen sharply in recent years, yet it is still estimated that around a million adults remain undiagnosed.

Here are the key signs from the experts at online health screening site HealthTest that your forgetfulness might be more than a personality trait, and why they happen.

10 signs your forgetfulness could be adult ADHD

You constantly lose things you just had

Keys, phone, glasses or bank cards can disappear within minutes. ADHD affects working memory, the brain’s short-term holding space. If something distracts you between putting an item down and moving on, that information can vanish completely.

You procrastinate, even on urgent tasks

With ADHD, starting tasks can feel incredibly hard unless they are interesting or urgent. The brain relies heavily on dopamine for motivation, and boring but important tasks often do not trigger enough of it to get going until stress kicks in.

You hyperfocus, then lose interest just as fast

ADHD is not a lack of focus but difficulty regulating it. You might become completely absorbed in something new, only to find that once the excitement fades, keeping your attention on it feels impossible.

You are late no matter how hard you try

Many adults with ADHD experience time blindness, which means struggling to sense how much time has passed. You might underestimate how long things take or forget to factor in getting-ready time, school runs or traffic.

You zone out in conversations or meetings

You may find your mind drifting, missing key details or interrupting without meaning to. ADHD brains can struggle to filter out background noise or racing thoughts, especially in low stimulation settings like long meetings.

You start lots of projects but finish very few

The excitement of starting something new gives a burst of motivation. Once tasks become repetitive or less stimulating, that motivation drops quickly, leaving half-finished projects behind.

Your emotions feel bigger than other people’s

Small frustrations can feel overwhelming, while minor wins can make your whole day. ADHD affects emotional regulation, meaning emotions can rise quickly and take longer to settle. This is not moodiness, but a neurological difference.

You forget appointments despite reminders

Even with alarms and calendars, things still get missed. ADHD often affects prospective memory, which is remembering to act on a plan at the right time. If your brain is absorbed in something else, the reminder may not translate into action.

Everyday admin feels exhausting

Emails, forms and bills can feel overwhelming before you even start. These low stimulation but high importance tasks are particularly hard for ADHD brains, making avoidance feel like the only option.

You have been labelled disorganised or lazy

Many adults with ADHD grow up hearing these words, especially at school or work. In reality, their brains process information and manage time differently, often meaning they work much harder than it appears.

The hidden toll of undiagnosed adult ADHD

When ADHD goes unrecognised, it can quietly affect many areas of life.

Relationships

Forgetting plans or reacting strongly in arguments can be misread as not caring, when the real struggle is memory, focus and emotional control.

Finances

Impulsive spending and avoidance of financial admin can lead to mounting stress, late fees and guilt.

Career

Missed deadlines or lateness may be mistaken for a lack of effort, which can hold people back from opportunities and lead to burnout.

Mental health

Years of criticism or feeling behind can damage self-esteem and contribute to anxiety, burnout and depression.

What to do if this sounds like you

If you recognise yourself in these signs support is available.

Take an online screening test to see whether further assessment could be helpful.
Speak to your GP about an ADHD referral, although NHS waiting lists can be long.
Consider private assessment options and share results with your GP.
Make small changes now, like using visual reminders, breaking tasks into steps and building buffer time into your day.

Authors

MadeForMums team