Is It ADHD or Anxiety? How to Tell the Difference (and Why It Matters)

"Have You Tried Not Worrying About It?"

You're sitting in your GP's office describing how your brain never stops. How you can't concentrate. How you feel restless and overwhelmed. How you avoid tasks and lie awake at night with your thoughts racing.

Your GP nods sympathetically and says: "That sounds like anxiety."

And maybe it is. But maybe it isn't. Or maybe it's both. And the difference matters more than you might think, because the treatment for ADHD and the treatment for anxiety are fundamentally different, and getting the wrong one means years of wondering why you're not getting better.

This is one of the most common diagnostic mixups in mental health. ADHD and anxiety share so many surface-level symptoms that distinguishing between them requires looking deeper than most standard assessments go. And for the millions of people living with one, the other, or both, getting the right answer changes everything.

If you've been treated for anxiety and it hasn't fully worked, or if you're wondering whether something else is going on underneath, this article is for you.

What I see with clients all the time: "I've been on anxiety medication for years and it helps a bit, but I still can't get organised, focus, or manage my time." That's often the moment we realise it's not just anxiety. Mentoring can help you figure out what's really going on.

Where ADHD and Anxiety Look the Same

The overlap is genuinely confusing, even for professionals. Here's why these two conditions get mistaken for each other:

If you showed this list to a GP without the middle columns, they could reasonably diagnose either condition. Which is exactly what happens.

The Key Differences

Racing Thoughts: Scattered vs. Spiral

This is one of the most useful differentiators. ADHD racing thoughts bounce between unrelated topics: "I need to email Sarah, I wonder what's for dinner, that song is stuck in my head, did I lock the car, I should learn Spanish, why are flamingos pink?" They're fast, random, and often creative.

Anxiety racing thoughts spiral around a theme: "What if I fail the presentation? If I fail, they'll think I'm incompetent. If they think I'm incompetent, I'll get fired. If I get fired, I can't pay rent. If I can't pay rent..." They're repetitive, fear-driven, and hard to break out of.

Many ADHD adults have both types. But noticing which pattern dominates can point you in the right direction.

Avoidance: Can't vs. Scared To

ADHD avoidance often comes from executive dysfunction. You're not afraid of the task. You just genuinely cannot make your brain start it. It's like trying to push a car with the handbrake on. There's no fear, just an invisible barrier between intention and action.

Anxiety avoidance comes from fear. You're afraid of doing the task badly, of being judged, of the consequences. The barrier isn't executive dysfunction; it's anticipated negative outcomes.

Again, both can be present simultaneously. But asking "am I avoiding this because I'm scared, or because my brain won't engage?" can be illuminating.

Restlessness: Energy vs. Tension

ADHD restlessness is energetic. You need to move, fidget, bounce your leg, tap your pen. It's your body looking for stimulation. If you get up and walk around, it often feels better immediately.

Anxiety restlessness is tense. Your muscles are tight. Your jaw is clenched. You feel wired but not in a productive way. Movement might help temporarily, but the underlying tension remains.

Focus: Inconsistent vs. Consumed

ADHD focus is inconsistent. You can't concentrate on boring things but can hyperfocus for hours on interesting things. Your attention works, just selectively.

Anxiety focus problems are different. You can't concentrate because your mental bandwidth is consumed by worry. It's not that the task isn't interesting enough; it's that your brain is using all its resources to process threats.

When Anxiety Is Actually Caused by ADHD

This is where it gets really important. For many people, their anxiety isn't a separate condition at all. It's a direct consequence of living with undiagnosed ADHD.

Think about it. If you've spent years:

• Missing deadlines and disappointing people
• Forgetting important things and being called careless
• Saying the wrong thing in conversations
• Struggling to keep on top of basic life admin
• Watching everyone else manage things that feel impossible for you
• Building elaborate coping strategies just to appear "normal"

...wouldn't you be anxious?

This is sometimes called "secondary anxiety," and it's extremely common in ADHD. The anxiety is real, but it's being generated by the stress of living with unmanaged ADHD. Treat the ADHD, and the anxiety often reduces dramatically, because the things causing the anxiety (chronic failure, disorganisation, social mishaps) improve.

This is why getting the right diagnosis matters so much. If your anxiety is secondary to ADHD, anxiety medication alone won't fix it. You need the ADHD treated too.

How ADHD Gets Missed When Anxiety Is Diagnosed First

Several factors conspire to make ADHD invisible behind an anxiety diagnosis:

Anxiety is more "recognisable." GPs are trained to spot anxiety. The screening tools (GAD-7) are quick and familiar. ADHD in adults is less well-understood, particularly in women, and assessment is more complex.

Masking hides ADHD symptoms. By adulthood, many ADHD adults have developed extensive compensatory strategies. They might appear organised on the outside while internally drowning. Anxiety, by contrast, is harder to mask and more likely to prompt help-seeking.

Gender bias. Women with ADHD are more likely to present with inattentive type (daydreaming, forgetfulness, internal restlessness) rather than hyperactive type (fidgeting, impulsivity, disruptive behaviour). Inattentive symptoms look like anxiety to clinicians who aren't looking for ADHD.

"You're too successful for ADHD." If you've managed to hold down a job and maintain relationships (through enormous invisible effort), clinicians may dismiss ADHD as a possibility. Academic or professional success doesn't rule out ADHD. It often indicates extreme compensatory effort, which is exhausting and, ironically, anxiety-inducing.

Getting the Right Diagnosis

What to Raise with Your GP

If you suspect ADHD alongside or instead of anxiety, be specific:

• "I've been treated for anxiety but I also struggle significantly with organisation, time management, and focus"
• "My concentration problems aren't just when I'm worried. They happen all the time, even when I'm relaxed"
• "I've had these difficulties since childhood, not just since my anxiety started"
• "Anxiety treatment has helped my worry but not my ability to function day-to-day"

A detailed guide to getting an ADHD assessment in the UK can help you prepare.

What to Expect in Assessment

A proper ADHD assessment should distinguish between ADHD and anxiety by exploring:

• Whether symptoms were present before age 12 (ADHD is lifelong; anxiety can develop at any age)
• Whether attention difficulties occur across all contexts or only during anxious periods
• Whether there's a family history of ADHD
• Whether executive function difficulties persist independent of mood

If you've already been assessed for anxiety, bring your records. A good assessor will look at the full picture, not just the presenting symptom. Our guide to what happens in an ADHD assessment covers this in detail.

Can You Treat Both?

Absolutely. If you have both ADHD and anxiety (which, remember, about 50% of ADHD adults do), both can be treated. ADHD medication and anxiety medication can be prescribed together. Many people find that treating ADHD first reduces their anxiety significantly, sometimes enough to come off anxiety medication entirely.

Non-medication approaches work alongside pharmacological treatment. CBT for anxiety, ADHD mentoring for practical strategies, and lifestyle changes like exercise and sleep hygiene all contribute.

You Deserve the Right Answer

Getting the wrong diagnosis isn't anyone's fault. ADHD and anxiety genuinely look alike from the outside, and the diagnostic system isn't perfect. But living with the wrong diagnosis means living with treatment that only half works, and spending years wondering why you can't just get better already.

If you've read this and something clicked, if you're thinking "wait, maybe it's not just anxiety," trust that instinct. You know your own brain better than anyone. And getting the right answer, whether it's ADHD, anxiety, or both, is the first step towards treatment that actually works.

If you want to explore what's really going on, book a free discovery call and let's talk it through. No diagnosis needed. Just honest conversation about what you're experiencing and what might help.