By Dr. Alex Littleton, PsyD
Understanding the Overlap Between ADHD and Anxiety
You sit down to work, and suddenly everything feels urgent and scattered. Your mind jumps from task to task. Your heart races a little. You can’t focus on what matters. Is this anxiety? Is this ADHD? Or is it something else entirely?
You’re not alone in this confusion. Many adults struggle to distinguish between ADHD and anxiety because they share overlapping symptoms. Both can involve racing thoughts, restlessness, difficulty concentrating, and a sense of being overwhelmed. The difference lies in the underlying mechanism, and that distinction matters enormously for treatment. A misdiagnosis can lead to years of ineffective therapy, medication that doesn’t fit, and frustration. The right diagnosis opens doors to genuine relief.
If you’ve ever wondered whether your attention struggles, racing mind, or sense of chaos point to ADHD, anxiety, or both, this guide will help you understand the key differences and why comprehensive assessment is your best path forward.
What Is ADHD and What Is Anxiety? Clinical Context
ADHD, or Attention-Deficit/Hyperactivity Disorder, is a neurodevelopmental condition characterized by persistent patterns of inattention and/or hyperactivity-impulsivity that interfere with functioning or development. It’s not about laziness or lack of willpower. The ADHD brain has differences in how it regulates attention, impulse control, and executive function (planning, organizing, time management). These differences exist from childhood, even if they weren’t formally recognized until adulthood.
Anxiety, by contrast, is a mental health condition marked by excessive worry, fear, or dread that persists beyond what the situation warrants. While everyone experiences anxiety sometimes, an anxiety disorder means the anxiety is frequent, intense, and gets in the way of daily life. The anxious brain perceives threat more readily and has difficulty downregulating that alarm response.
Here’s the critical distinction: ADHD is about how your brain processes and prioritizes information. Anxiety is about how your brain perceives and responds to threat. They are different systems, even though they can appear similar on the surface.
Why Traditional Screening Often Confuses ADHD and Anxiety
Many adults receive ADHD or anxiety diagnoses based on a brief screening at their primary care doctor’s office or a quick online assessment. These tools can point in a direction, but they frequently miss the full story. Here’s why: ADHD and anxiety create overlapping symptoms, and they often co-occur in the same person.
Consider focus problems. An anxious person might struggle to concentrate because their mind is spinning with worry. A person with ADHD might struggle to concentrate because their brain doesn’t naturally prioritize boring tasks over interesting distractions. A traditional screener asks “Do you have trouble focusing?” and both answer yes, but for entirely different reasons.
Additionally, undiagnosed ADHD can create secondary anxiety. Imagine living your whole life with an unrecognized attention or executive function deficit. You miss deadlines, lose important papers, interrupt people, and forget conversations you just had. Over time, you might develop anxiety about these struggles because you’re constantly trying to manage chaos that your brain isn’t wired to handle easily. In this scenario, the underlying ADHD is never identified because the anxiety symptoms are so prominent.
This is where comprehensive psychological assessment becomes invaluable. A thorough evaluation includes detailed developmental history, targeted cognitive testing, attention and executive function measures, mood screening, and careful differential diagnosis. In the Denver and Englewood area, we use evidence-based assessment batteries at Vivid Psychology Group to separate the signal from the noise, ensuring you get diagnosed accurately so treatment can address the actual problem.
The Deep Dive: Key Differences Between ADHD and Anxiety
Let’s explore the signature features of each condition more carefully.
ADHD: The Executive Function and Attention Challenge
ADHD typically shows up as a pattern of inattention, hyperactivity, or both. Here are the hallmarks:
Inattention looks like difficulty sustaining focus on tasks, especially non-preferred or boring tasks. A person with ADHD might start a project, lose interest or get distracted, and struggle to return to it. They might have a messy desk, forget appointments despite having them on their calendar, or frequently lose keys and phones. Time blindness is common: they underestimate how long tasks will take. They might interrupt others without intending rudeness; their brain simply hasn’t signaled them to wait.
Hyperactivity and impulsivity show up as fidgeting, restlessness, or a sense of internal motor running. Some adults describe it as “driven by a motor.” Impulsivity might mean speaking without thinking, making quick decisions without weighing consequences, or difficulty waiting their turn. These patterns have been present since childhood, even if they weren’t recognized at the time.
Crucially, ADHD symptoms are not driven by anxiety. A person with ADHD isn’t losing their keys because they’re worried. They’re losing them because their brain isn’t naturally encoding and organizing that information.
Anxiety: The Threat Detection and Worry System
Anxiety typically shows up as excessive worry, fear, or a sense of impending doom. Here are the hallmarks:
The anxious mind generates worry. A person with anxiety might ruminate on past mistakes, worry about future “what-ifs,” or catastrophize about unlikely scenarios. They might have physical symptoms: racing heart, tight chest, stomach upset, trembling. They might avoid situations they anticipate will be anxiety-provoking. Sleep often suffers because the mind won’t settle.
Importantly, anxiety is often situation-dependent. A person with social anxiety feels fine until they anticipate a social event, then dread and physical symptoms escalate. A person with health anxiety might be fine until they notice a bodily sensation, then worry spirals. The anxiety is triggered by a perceived threat.
Concentration problems in anxiety typically stem from the mind being pulled toward threat-related thoughts. You sit down to work, but your mind keeps circling back to a worry. This is different from ADHD inattention, where the problem is more about executive functioning and impulse control across the board.
The Overlap: Why They Look Alike
Both ADHD and anxiety can cause:
- Difficulty concentrating (but for different reasons)
- Restlessness or fidgeting
- Sleep problems
- Difficulty with time management
- A sense of being overwhelmed
This overlap is why a simple questionnaire isn’t enough. You need someone who understands both conditions deeply and can tease apart the mechanisms.
What Success Looks Like: Diagnosis and Treatment Matching
When you receive an accurate diagnosis, treatment becomes targeted and effective. If you have ADHD, medication or behavioral strategies for executive function make sense. If you have anxiety, evidence-based approaches like cognitive-behavioral therapy (CBT) or acceptance and commitment therapy (ACT) address the worry and avoidance patterns. If you have both, treatment addresses both.
Many clients notice that once they understand which condition is driving their struggles, relief starts immediately. Not because the condition vanishes, but because they finally understand what they’re dealing with. They can stop blaming themselves for laziness or weakness. They can access the right tools.
The path forward depends on your diagnosis. That’s why getting it right matters so much.
Finding the Right Practitioner for Comprehensive Assessment
Comprehensive ADHD and anxiety assessment requires training in psychological testing, knowledge of differential diagnosis, and experience with both conditions. Your primary care doctor, while valuable, typically doesn’t have the time or specialization for this level of assessment.
Look for a psychologist or psychological examiner who is licensed and trained in comprehensive psychological assessment. In Colorado and the Denver metro area, including Englewood, we at Vivid Psychology Group offer detailed assessments that distinguish between ADHD, anxiety, learning disabilities, and other conditions.
You can also ask your insurance for psychologists who specialize in ADHD assessment. Many assessments are offered on an out-of-network basis and can be submitted for reimbursement through your insurance superbill.
Visit https://vividpsychologygroup.com/psychological-assessments/ to learn more about what comprehensive assessment includes.
Frequently Asked Questions
Can I have both ADHD and anxiety at the same time?
Yes, absolutely. Many people have both conditions. When both are present, treatment addresses both. You might use medication or behavioral strategies for ADHD and therapy for anxiety. A comprehensive assessment will identify both so nothing gets missed.
How is ADHD actually diagnosed?
ADHD diagnosis involves detailed developmental history (symptoms from childhood), behavioral observations, cognitive testing to assess attention and executive function, and screening for mood and anxiety. There’s no single test that “proves” ADHD; diagnosis is clinical, based on pattern recognition by a trained clinician who uses standardized tools.
Will getting tested change my treatment?
Almost always, yes, for the better. An accurate diagnosis means you receive treatment that actually fits your brain and your needs. Many adults report that getting a proper ADHD or anxiety diagnosis, or discovering they have both, was life-changing because treatment finally made sense.
Is comprehensive assessment worth the cost?
For many people, yes. Untreated ADHD or misdiagnosed anxiety can cost you years of struggle, relationship strain, lost productivity, and ineffective treatment attempts. A comprehensive assessment, often 4-8 hours of testing and interpretation, provides clarity that informs decades of better decisions. Many insurance plans partially reimburse through out-of-network benefits.
Next Steps
Small steps lead to big changes. If you’re uncertain whether your struggles point to ADHD, anxiety, or both, a comprehensive psychological assessment might be your best first move. You’ll get answers, a clear report, and recommendations tailored to your actual needs.
Schedule a free phone consultation to see if we are a good fit.
