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ADHD vs Anxiety: How to Tell the Difference

The symptoms overlap almost completely — but the causes and treatments are different. Here's how to tell them apart, and why it matters.

📖 7 min read🔬 Research-basedUpdated 2025

Can't concentrate. Restless. Can't sleep. Irritable. Forget things constantly. These symptoms describe both ADHD and anxiety — which is why so many people get one diagnosis when they actually have the other, or both at the same time.

Getting the distinction right matters because the treatments are different. Stimulant medication is a first-line treatment for ADHD but can worsen anxiety in some people. Therapy for generalized anxiety uses different techniques than behavioral strategies for ADHD. Misdiagnosis means years of treatment that only partially works.

The Core Difference

Here's the clearest way to think about it:

🔀ADHD

The mind wanders because it's seeking something more interesting. It drifts everywhere — it's not stuck on anything, it's just not staying put.

🔁Anxiety

The mind returns obsessively to a specific worry. It's not distracted by everything — it's captured by one thing it can't let go of.

Symptom-by-Symptom Comparison

Symptom
ADHD
Anxiety
Source of distraction
Mind seeks novelty and stimulation
Mind returns to a specific worry
Onset
Childhood (even if diagnosed later)
Can develop at any age
Sleep problems
Racing thoughts, can't wind down
Lying awake worrying about specific things
Concentration difficulty
Bored or unstimulated tasks → mind wanders
Worry crowds out ability to focus
Restlessness
Physical need to move; driven by a 'motor'
Tension, physical on-edge feeling
Irritability
Frustration from overstimulation or task demands
Tension and hypervigilance
Memory issues
Working memory deficits; forgets even when trying
Distraction from worry impairs encoding
Responds to stimulants?
Usually yes — reduces symptoms
May worsen anxiety in some cases

Why They So Often Occur Together

About 50% of adults with ADHDalso meet criteria for an anxiety disorder (Kessler et al., 2006). This is not a coincidence — there's a direct causal relationship:

ADHD creates the conditions for anxiety

Chronic disorganization, forgotten commitments, social mistakes, and repeated underperformance generate a genuine, rational fear of what you'll mess up next. This is anxiety with a real cause.

Both affect the same brain circuits

ADHD and anxiety disorders both involve dysregulation of the prefrontal cortex and limbic system. Overlapping neurobiology means overlapping symptoms.

Anxiety can mask ADHD

Some people with ADHD develop anxiety-driven hypervigilance as a coping mechanism — triple-checking everything, arriving early, over-preparing. This can hide ADHD symptoms until a major life stressor breaks the coping strategy.

Questions to Ask Your Doctor

  • 1Were these symptoms present in childhood, before major stressors began? (ADHD) or Did they develop after a stressful event? (Anxiety)
  • 2Does my concentration improve when I'm doing something I find genuinely interesting? (Points to ADHD)
  • 3Do I worry about specific things, or does my mind just drift generally? (Specific worry = anxiety; general drift = ADHD)
  • 4Would you consider screening me for both ADHD and an anxiety disorder?
  • 5If I do have both, which should we treat first?

Not sure which applies to you?

Start with the free Adult ADHD screener — results in under 5 minutes.

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Frequently Asked Questions

Can you have both ADHD and anxiety?

Yes — and it's very common. Studies show that approximately 50% of adults with ADHD also meet criteria for an anxiety disorder. The two conditions frequently co-occur, and untreated ADHD often generates secondary anxiety as a person repeatedly fails to meet their own expectations, misses deadlines, and struggles in social and professional settings. Treating the underlying ADHD sometimes reduces anxiety significantly.

What is the key difference between ADHD and anxiety?

The core difference is the source of the distraction. In ADHD, the mind wanders because it's seeking stimulation — it drifts to anything more interesting or novel. In anxiety, the mind is hijacked by a specific worry — it returns obsessively to the same fear. People with ADHD are distracted by everything; people with anxiety are distracted by one thing. Another key difference: ADHD is present from childhood and is consistent across settings, while anxiety disorders can develop at any age and may be tied to specific triggers.

Can ADHD cause anxiety?

Yes. Unmanaged ADHD creates the conditions for anxiety: chronic disorganization, repeated missed deadlines, social mistakes, and the constant fear of what you'll forget next can generate an anxious state that looks like generalized anxiety disorder. For many people, anxiety is a consequence of undiagnosed ADHD rather than a separate primary condition. This is why correctly identifying which came first matters — treating anxiety without addressing ADHD often leads to only partial improvement.

Do ADHD and anxiety have the same symptoms?

Several symptoms overlap: difficulty concentrating, restlessness, sleep problems, and irritability appear in both. However, the cause of each symptom differs. ADHD-related concentration problems come from difficulty sustaining attention. Anxiety-related concentration problems come from worries crowding out other thoughts. ADHD restlessness is physical and driven by the need for stimulation. Anxiety restlessness is driven by a sense of impending threat. The distinction matters for treatment.

How is ADHD with anxiety treated differently from anxiety alone?

When ADHD and anxiety co-occur, treatment typically addresses both — but the order and approach matters. If ADHD is primary and anxiety is secondary, treating ADHD first (with medication and/or behavioral strategies) often reduces anxiety naturally. If anxiety is severe, it may need to be stabilized first, since stimulant medications can initially worsen anxiety. A psychiatrist who specializes in both conditions is ideal for developing a treatment plan.

Sources

Kessler, R.C. et al. (2006). The prevalence and correlates of adult ADHD in the United States. American Journal of Psychiatry, 163(4), 716–723.

Schatz, D.B. & Rostain, A.L. (2006). ADHD with comorbid anxiety: A review of the current literature. Journal of Attention Disorders, 10(2), 141–149.

Tannock, R. (2009). ADHD with anxiety disorders. In T.E. Brown (Ed.), ADHD Comorbidities. American Psychiatric Publishing.

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