Curious about how ADHD shows up in adulthood? You are not alone! In this blog, I’ll walk you through the common symptoms of adult ADHD and explain the underlying neuroscience. It will help you understand better your brain, your behaviors, and why some things feel harder than they should.
WHICH PART OF THE BRAIN IS AFFECTED?
Image from kjpargeter on Freepik
ADHD is a neurodevelopmental condition, which means that the ADHD brain develops differently from the neurotypical brain. The main area affected is the frontal lobe.
The frontal lobe is responsible for:
- attention
- impulse control
- social behaviour
- ability to delay gratification
- motivation
- planning
- decision-making
- judgment
- time perception
- problem-solving
- memory
- language
WHAT DOES IT LOOK LIKE IN TERMS OF SYMPTOMS?
Distractibility
Research shows that the ADHD brain has more difficulty filtering out irrelevant information. This means you may be more easily distracted by what’s happening around you (noises, visuals or smells) as well as by what’s happening inside you (your thoughts, body sensations or emotion). Because the ADHD brain takes in so much information at once, daily life can feel overwhelming and exhausting.
Impulsivity
Impulsivity is a core feature of ADHD and can show up in many everyday ways—making quick decisions, jumping into projects without thinking through the steps, struggling to wait, interrupting others, or having a low tolerance for frustration. It can also mean reacting quickly and intensely when emotions are triggered. Over time, this impulsivity can create a sense of chaos and place strain on relationships, even when your intentions are good.
Restlessness
If you experienced hyperactivity as a child, it often shows up as inner restlessness in adulthood. You may find yourself fidgeting, having difficulty staying seated or quiet in certain situations, or feeling as though you’re constantly “on the go.” Many adults also describe trouble relaxing and a sense that their thoughts are always racing.
Poor organization
Organization can be especially challenging for people with ADHD. You might struggle with clutter at home or work, start many projects without finishing them, have difficulty completing daily tasks, prioritizing, or making decisions, and feel overwhelmed by small changes or often run late. This is linked to differences in executive functioning—the skills that help with planning, prioritizing, decision-making, impulse control, and working toward goals. Creating supportive routines and systems can make a big difference by providing external structure to help compensate for these challenges.
Poor working memory
Working memory is the ability to hold a small amount of information in mind long enough to complete a task. With ADHD, this system can be less efficient, making it harder to take in information or keep it active for very long. As a result, you may forget things more easily, struggle to follow through on projects, or find it difficult to reach your goals—even when you’re motivated.
Time blindness
Recent research suggests that “time blindness” is a core feature of adult ADHD. Time perception, or chronoception, is our subjective experience of the passage of time—and for many people with ADHD, time often doesn’t exist until they see it. This can make it hard to estimate how long tasks will take, leading to time management challenges, chronic lateness, and added stress.
***Please note that ADHD can manifest a bit differently from one person to the other. You might not have all of the symptoms described above and they may vary in intensity.
WHAT ABOUT THE NEUROTRANSMITTERS?
Research shows that the ADHD brain tends to have lower levels of dopamine, the neurotransmitter involved in pleasure and attention regulation. This can make it harder to stay motivated, causing tasks or projects to lose their appeal and remain unfinished.
To compensate, people with ADHD often seek out activities that provide a quick dopamine boost—like eating, shopping, drinking, using substances, social media, short videos, or sex. These short-term rewards can feel compelling but may make it harder to focus on long-term goals, creating a cycle of distraction and frustration.
ADHD can affect serotonin, a brain chemical that helps regulate sleep, digestion, and mood. This imbalance can make it harder to fall asleep, stay rested, or manage emotions. You might notice feeling irritable, easily frustrated, or emotionally “on edge,” even over small things—something many people with ADHD experience.
IMPACT ON MENTAL HEALTH
ADHD is a real condition that can have a big impact on daily life. It can make it harder to focus, meet deadlines, stay on time, and keep up in a world that expects constant attention. Many people with ADHD experience stress, frustration, and feelings of inadequacy.
This helps explain why ADHD often occurs alongside anxiety, depression, or addiction. If you’re struggling with these challenges, ADHD could be an underlying factor that deserves attention. Talking with your family doctor about managing your symptoms and seeking counselling can be an important first step toward support and balance.
HOW CAN THERAPY HELP WITH ADHD ?
I find that clients often benefit from gaining a deeper understanding of their ADHD symptoms and how living with these experiences has shaped who they are. This process can help release feelings of shame and self-doubt, creating space for greater self-compassion and renewed motivation for change.
We can also work together to strengthen your ability to listen to your body, manage emotions more effectively, improve relationships, shift addictive or unhelpful patterns, and build confidence. Ultimately, therapy can support you in finding a healthier balance between gently challenging yourself and offering yourself kindness.
To book an appointment, follow this link: mylifecounselling.janeapp.com