10 Signs It's Anxiety, Not ADHD

Why the overlap between these two conditions leads to missed diagnoses — and how to tell the difference.

By Dr. McKinzie Duesenberg-Marshall, PhD, LP, NCSP | Minds in Progress, LLC

If you've ever wondered whether your child's struggles with focus, restlessness, or avoidance are "just anxiety" or something more... you're asking exactly the right question. The challenge is that anxiety and ADHD look remarkably similar on the surface. Both can cause inattention, emotional dysregulation, sleep disruption, and academic difficulties. That overlap is one of the most common reasons children end up with the wrong diagnosis.

We've written before about how these two conditions overlap and where they diverge — and if you haven't already, we'd encourage you to read that post first: [LINK: "Anxiety vs. ADHD" — minds-in-progress.com]

This post goes one step further. Rather than comparing both conditions side by side, we're focusing specifically on the signs that tend to point toward anxiety... signs that can be missed when the conversation starts and ends at "ADHD." Research suggests that anxiety disorders are diagnosed in up to 50% of children with ADHD (Schatz & Rostain, 2006), which makes it critical to evaluate both, not just the one that looks loudest in the classroom.

Whether you've already received an ADHD diagnosis for your child or are in the middle of figuring out what's going on, these 10 signs may help you see a fuller picture.

10 Signs It Might Be Anxiety — Not ADHD

These signs don't rule out ADHD, and they're not a diagnostic checklist. What they do is help you see patterns that are often associated with anxiety as a primary driver of your child's challenges.

1. Your child can focus...when they're calm.

   • One of the most telling clinical distinctions: ADHD-related inattention happens regardless of emotional state. The ADHD brain is easily distracted even when the mind is quiet and nothing is causing stress.

   • Anxiety-driven inattention, by contrast, is situational; it tracks closely with worry. If your child can sit down and complete homework just fine when nothing is stressing them out, but falls apart in high-pressure moments, that's important information.

   • Ask yourself: Is the inattention constant, or does it come and go with stressors?

2. The "what if" questions don't stop.

   • Anxiety-driven children are often mental catastrophizers. They rehearse worst-case scenarios, seek reassurance repeatedly, and ask the same worried questions even after you've answered them. This pattern (repetitive, fear-fueled, hard to redirect) is a signature feature of anxiety, particularly Generalized Anxiety Disorder (GAD). ADHD may cause impulsive questions, but those are typically task-abandoning (jumping to the next thought), not worry-anchoring.

   • If reassurance provides only a few minutes of relief before the questions start again, anxiety is likely doing the work.

3. Physical complaints appear before stressful events.

   • Children with anxiety often experience a strong mind-body connection. Stomachaches before school, headaches on test days, nausea before a birthday party — these somatic symptoms are the body's physiological response to perceived threat.

   • The pattern matters: symptoms that reliably appear before specific situations and resolve once the situation has passed are a red flag for anxiety, not ADHD.

   • ADHD does not have a predictable somatic signature tied to upcoming events.

4. Avoidance is the primary coping strategy.

   • When anxiety is driving the bus, avoidance is usually riding shotgun. Your child may refuse to go to school, avoid extracurricular activities they used to love, shut down before starting tasks that feel uncertain, or beg to stay home from social events.

   • This fear-motivated avoidance is different from ADHD-related task avoidance, which tends to be about boredom or difficulty initiating — not dread.

   • The question to ask: Is my child avoiding because something feels hard to start, or because something feels genuinely threatening?

5. Worry is global... not just about executive functioning.

   • Children with ADHD can certainly develop anxiety as a secondary response to executive functioning struggles (missed homework, social missteps, poor time management). That anxiety tends to center on those specific ADHD-related difficulties.

   • Primary anxiety, however, is more global and pervasive — worrying about health, safety, friendships, the future, natural disasters, whether a parent is okay. If the worry covers a wide range of topics that aren't directly tied to tasks or performance, anxiety is likely primary (Katzman et al., 2017).

6. Sleep trouble is about thoughts, not settling down.

   • Both ADHD and anxiety disrupt sleep, but for different reasons. Children with ADHD often struggle to wind down because their brain doesn't shift easily into rest mode. Children with anxiety lie awake running through worries, mentally rehearsing tomorrow, catastrophizing, or feeling a nameless sense of dread.

   •  If your child can tell you exactly what's keeping them up... and it's a list of specific worries... that's an anxiety signature.

   • The key distinguisher: ADHD kids can't turn off the activity; anxious kids can't turn off the worry.

7. Perfectionism and fear of mistakes drive behavior.

   • Anxiety-driven children often have an intense fear of being wrong, being judged, or failing. You may see repeated erasing, refusal to submit work that's "good enough," tearful meltdowns over a B+, or a child who won't attempt something new unless they're certain they'll succeed. This perfectionism is fear-based and rooted in evaluation anxiety.

   • ADHD procrastination, by comparison, typically comes from difficulty initiating tasks or being bored... not from terror about the outcome.

8. Social situations trigger fear or shutdown.

   • While ADHD can make social interactions more difficult (due to impulsivity, interrupting, or misreading social cues), anxiety specifically produces fear about social evaluation... worry about being judged, embarrassed, or rejected.

   • Social anxiety disorder, in particular, leads children to dread group situations, avoid speaking in class, rehearse conversations obsessively, and feel extreme shame after perceived social missteps. The underlying driver is fear, not dysregulation.

   • If your child describes school as scary rather than boring or overwhelming, that framing matters.

9. Your child is hypervigilant... always scanning for problems.

   • Anxious children are often the ones who notice everything: when a parent seems stressed, when a classmate looks upset, when a teacher seems unhappy with them. This hypervigilance (a state of heightened alertness to potential threat) is an anxiety signature. It's exhausting, and it can look like distraction, emotional sensitivity, or even people-pleasing on the surface.

   • ADHD, by contrast, often produces the opposite: missing environmental cues, not noticing that the teacher is frustrated or that a friend is upset.

10. Symptoms improve significantly in predictable, low-stakes environments.

    • Here is one of the clearest clinical differentiators: anxiety symptoms are highly responsive to environmental conditions. When the stakes are lowered, expectations are clear, routines are stable, and threatening situations are removed, anxious children often function remarkably well. When those conditions shift (e.g., new school year, substitute teacher, unexpected change), anxiety surges.

    • ADHD symptoms, being neurologically based, persist regardless of environmental calm. If your child seems like a "different kid" during summer or on weekends, that's not nothing.

    • Environmental responsiveness tells us a great deal about what's driving the behavior.

When to Seek an Evaluation

Reading a list of signs like this one can leave parents in a difficult spot; feeling like they almost know what's going on, but not quite. If you're seeing several of these signs in your child, or if you've been told "it's ADHD" but something still doesn't feel right, that's worth following up on. Early, accurate identification changes outcomes.

You don't have to wait until your child is in crisis. The earlier anxiety is accurately identified and addressed, the better the long-term trajectory... for your child's mental health, their academic success, and their relationship with learning.

References

American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.). American Psychiatric Publishing. https://doi.org/10.1176/appi.books.9780890425787

Angold, A., Costello, E. J., & Erkanli, A. (1999). Comorbidity. Journal of Child Psychology and Psychiatry, 40(1), 57–87. https://doi.org/10.1111/1469-7610.00424

Jarrett, M. A., & Ollendick, T. H. (2008). A conceptual review of the comorbidity of attention-deficit/hyperactivity disorder and anxiety: Implications for future research and practice. Clinical Psychology Review, 28(7), 1266–1280. https://doi.org/10.1016/j.cpr.2008.05.004

Katzman, M. A., Bilkey, T. S., Chokka, P. R., Fallu, A., & Klassen, L. J. (2017). Adult ADHD and comorbid disorders: Clinical implications of a dimensional approach. BMC Psychiatry, 17(1), 302. https://doi.org/10.1186/s12888-017-1463-3

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. https://doi.org/10.1177/1087054706286698

Silverman, W. K., & Ollendick, T. H. (2005). Evidence-based assessment of anxiety and its disorders in children and adolescents. Journal of Clinical Child and Adolescent Psychology, 34(3), 380–411. https://doi.org/10.1207/s15374424jccp3403_2