You can't concentrate. Your thoughts race. You feel restless and overwhelmed. You struggle to follow through on things and sometimes feel emotions more intensely than the situation seems to warrant. You've wondered whether you might have anxiety. You've also wondered whether you might have ADHD.
The overlap between these two conditions is significant enough that they are routinely confused — by individuals trying to understand themselves, and by clinicians who only have a brief appointment to work with. Getting the distinction right matters, because the approaches that help with anxiety and the approaches that help with ADHD are not the same thing.
Why Anxiety and ADHD Look So Similar
At the symptom level, anxiety and ADHD share a striking amount of territory. Both can produce difficulty concentrating. Both involve restlessness — physical or mental. Both disrupt sleep. Both interfere with task completion. Both can cause emotional reactivity. Both tend to make people feel like they're not reaching their potential.
The reason they overlap is that both conditions affect executive function — the brain's capacity to regulate attention, emotion, and behaviour. They do this through different mechanisms, but the downstream effects look similar from the outside. And from the inside, when you're the one experiencing it, the distinction isn't always obvious.
An additional complication: ADHD that's been unmanaged for years frequently produces anxiety as a secondary consequence. Years of struggling, underperforming relative to your potential, and absorbing criticism takes a toll. So a person may present with what looks like anxiety — and it is anxiety — but the root cause is ADHD that's never been identified.
Where They Actually Diverge
The similarities are real. So are the differences. These are the questions that help distinguish them.
What is the source of the distraction?
In anxiety, distraction has content. The mind moves towards the specific things you're worried about — the conversation that went badly, the deadline, the relationship that feels uncertain. The distraction is purposeful in a neurological sense: the brain is directing attention towards perceived threats.
In ADHD, distraction is more indiscriminate. The mind moves towards whatever is most stimulating in the environment — a sound, a notification, a tangential thought — regardless of whether it's relevant or worrying. The problem isn't too much worry; it's too little ability to direct attention where it's needed.
What does the history look like?
ADHD is a neurodevelopmental condition — it's present from childhood, even if it wasn't recognised. If you look back across your life and find the same patterns in school, in university, across different jobs and relationships, that consistency points towards ADHD. The difficulties follow you into every context because the brain is the same brain in every context.
Anxiety can also be lifelong, but it can equally develop in response to specific circumstances — a stressful job, a difficult relationship, a traumatic event. If the difficulties are more recent, or became significantly worse at an identifiable point, anxiety is more likely to be the primary driver.
What makes it better or worse?
Anxiety tends to fluctuate with perceived threat. When things feel safe and under control, it eases. When stress increases, it worsens. A holiday usually helps — at least initially. An anxiety-driven focus problem often improves in low-stakes situations.
ADHD is less responsive to circumstances. The executive function difficulties are relatively constant — present when you're relaxed and when you're stressed, in familiar environments and new ones, when you care about something and when you don't. A holiday doesn't fix ADHD. Neither does removing the stressor.
How does it respond to stimulation?
This is one of the more counterintuitive differentiators. People with ADHD often find that stimulating environments help them focus — background noise, a busy café, music, a deadline-driven urgency. The ADHD brain is seeking stimulation it can't generate internally, so external stimulation can fill the gap.
For people with anxiety, high stimulation typically makes things worse. A busy environment amplifies the threat-scanning response. Urgency and pressure increase activation, not the productive kind. Calmer environments, more predictability, and reduced demands tend to ease anxiety — the opposite of what helps ADHD.
The assessment takes around 5 minutes and gives you a personalised breakdown of your results.
Start ADHD Assessment →The Symptoms That Appear in Both — But Mean Different Things
These are the specific symptoms most likely to create confusion when trying to distinguish anxiety from ADHD.
Racing thoughts. In anxiety, racing thoughts tend to cycle around specific worries — they return to the same concerns repeatedly. In ADHD, thoughts race in a different way: jumping rapidly from one unconnected topic to another, driven by association and novelty rather than worry. Both are exhausting. The content is different.
Restlessness. Anxiety-driven restlessness comes from a nervous system on high alert — physical tension, an inability to settle, a sense of waiting for something to happen. ADHD restlessness is more about needing stimulation: the difficulty of sitting still when there isn't enough happening, the internal pull towards movement and novelty.
Procrastination. Anxiety-driven procrastination is usually about avoidance — the task triggers fear of failure or judgment, so the brain avoids engaging with it. ADHD procrastination is about activation — the task doesn't generate enough interest or urgency for the brain to engage, regardless of how important it is. Both look identical from the outside.
Sleep difficulties. Anxiety tends to produce sleep-onset difficulty driven by worry and rumination — specific fears loop as you lie awake. ADHD sleep difficulties often look different: a naturally delayed body clock, thoughts that jump between interesting topics rather than anxious ones, and a general difficulty winding down that isn't specifically worry-driven.
Emotional reactivity. Anxiety produces emotions that are primarily threat-organised — fear, worry, shame about potential failure. ADHD produces a wider range of intense emotions: excitement, frustration, enthusiasm, irritability, devastation at perceived rejection. The intensity is similar; the emotional content is broader with ADHD.
When You Have Both
ADHD and anxiety co-occur at a rate well above chance. Studies suggest that between 30 and 50 per cent of adults with ADHD also meet criteria for an anxiety disorder. The relationship runs in both directions: ADHD can produce anxiety through accumulated difficulty, and anxiety can develop independently alongside ADHD.
Having both conditions doesn't make the situation hopeless — it just requires attention to both. ADHD medication, for instance, can reduce anxiety in some people by improving executive function and reducing the constant low-level struggle. In others, it can temporarily worsen anxiety, requiring medication for both to be calibrated carefully.
The key is not to assume that treating one will automatically resolve the other. An accurate picture of what you're actually dealing with is the starting point.
What to Do If This Sounds Familiar
If you've been treated for anxiety without significant improvement, or if anxiety treatment has helped somewhat but left significant difficulties with focus, organisation, and follow-through — it's worth exploring whether ADHD might be part of the picture.
A structured self-assessment for ADHD can help you understand how strongly those traits are present in your life. It won't replace clinical evaluation, but it can give you something concrete to bring to a GP or specialist — and a clearer sense of which direction is worth investigating.
A Note on Getting Support
Misdiagnosis in this area is common, and it matters. Someone treated for anxiety who actually has ADHD may see partial improvement but will continue to struggle with the executive function difficulties that anxiety treatment doesn't address. Getting the right answer — even if it takes more than one appointment — is worth the effort.
If you suspect you may have ADHD, anxiety, or both, please consider speaking with a GP or mental health professional with experience in both areas. A thorough assessment is the most reliable path to understanding what's actually going on.
This article is for informational purposes only and does not constitute medical advice or a clinical diagnosis. If you have concerns about your mental health, please speak with a qualified healthcare professional.