ADHD symptoms fall into two main groups: inattention, and hyperactivity with impulsivity. Some adults mainly have one type of symptom, and some have both.
Everyone experiences some of these things sometimes. What matters for ADHD is that the difficulties are ongoing, started in childhood, happen in more than one part of life, and cause real problems. The NHS says symptoms usually start before the age of 12.
Inattentive symptoms
The NHS lists signs such as:
- being easily distracted or forgetful
- finding it hard to organise your time
- finding it hard to follow instructions or finish tasks
- losing things often, like your wallet, mobile or keys
In adult life, this can also look like:
- drifting off in meetings or conversations, even when you care about them
- starting lots of projects but finishing few
- putting off tasks until the pressure of a deadline kicks in
- making careless mistakes in work you understand well
- finding it hard to read long documents or fill in forms
- feeling overwhelmed by admin, emails and post
Inattention isn’t the same as not trying. Many adults with ADHD can focus deeply on things they find interesting. Acas notes that someone with ADHD may have “times of hyperfocus”. The difficulty is directing attention when it’s needed.
Hyperactive and impulsive symptoms
The NHS lists signs such as:
- having a lot of energy or feeling restless
- being very talkative or interrupting conversations
- making quick decisions without thinking
In adults, hyperactivity is often less visible than in children. It might feel like:
- a restless mind that’s hard to switch off
- fidgeting, tapping or needing to move
- finding it hard to sit through films, meals or long meetings
- feeling uncomfortable doing nothing, or always keeping busy
Impulsivity can look like:
- speaking before thinking, or finishing other people’s sentences
- impatience in queues or traffic
- changing jobs, plans or relationships suddenly
- taking risks without thinking through the consequences
How symptoms affect daily life
For a diagnosis, NICE says symptoms must cause at least moderate problems in areas of life such as work, education, relationships or social life. Here’s how that can look.
| Area of life | Common difficulties |
|---|---|
| Work | Missed deadlines, lateness, trouble prioritising, boredom with routine tasks, conflict over mistakes |
| Time | Underestimating how long things take, losing track of time, “time blindness” |
| Money | Impulse buying, late payment fees, forgotten subscriptions, unopened bills |
| Home | Clutter, unfinished jobs, forgetting appointments |
| Relationships | Forgetting plans, seeming not to listen, interrupting, arguments about chores |
| Driving | Losing focus on long journeys, impatience with other drivers |
These patterns can lead to real consequences, like job loss or debt. Over time, many adults also carry a lot of shame and self-criticism. It’s worth knowing that these difficulties are common in ADHD and that support is available. See living with ADHD for practical ideas.
Emotions and ADHD
Many adults with ADHD say that emotions are one of the hardest parts. Mind lists struggling to recognise and manage emotions, sometimes called emotional dysregulation, among possible ADHD experiences.
This might include:
- feeling emotions very intensely and quickly
- a short fuse, with frustration that flares and passes
- finding criticism or rejection very painful
- mood that shifts through the day in response to events
You may see the term “rejection sensitive dysphoria” online. It isn’t a formal diagnosis. If intense reactions to rejection affect your life, it’s still worth telling the person assessing you.
Symptoms that overlap with other conditions
Many ADHD symptoms can also be caused by other things. Poor concentration, restlessness and low motivation can be part of anxiety, depression, poor sleep, some physical health problems, or substance use. Mind notes that ADHD symptoms can be mistaken for mental health problems, and that ADHD often occurs alongside conditions like anxiety and depression.
Some examples:
- Anxiety can cause restlessness and poor concentration, but usually linked to worry.
- Depression can reduce focus and motivation, but usually alongside low mood lasting weeks or months.
- Bipolar disorder can involve impulsivity and high energy, but in episodes rather than all the time.
- Autism can share difficulties with organisation and social situations.
- Menopause and perimenopause can cause problems with memory and concentration.
This is one reason a proper assessment matters. See ADHD and other conditions for more.
Screening questionnaires
If you want a starting point, a short self-report questionnaire can help you organise your thoughts. A widely used one is the Adult ADHD Self-Report Scale (ASRS), developed with the World Health Organization. ADHD UK offers an adult ADHD screening survey based on it.
Keeping a note of your symptoms
Before speaking to a GP or specialist, it helps to write things down. Try noting:
- specific examples from the last few months, at work, at home and socially
- what you remember from childhood, and what school reports said
- how long things have been this way
- what you’ve tried and how much effort it takes to cope
- anything that makes symptoms better or worse, like sleep, alcohol or stress
- what family members or a partner have noticed
This will be useful for an ADHD assessment, whichever route you choose.