My ADHD Child's Anxiety Doesn't Look Like Worry — The Physical Symptoms I Kept Missing

For almost an entire school year, I thought Oliver was faking his stomachaches.

Every Monday morning. Sometimes Wednesdays. Always on the days he had PE or a quiz or something that even slightly disrupted his routine. He'd curl up on the bathroom floor, eyes glassy, genuinely pale. And I — a former pediatric OT who should have known better — would think here we go again and try to hustle him out the door.

I want to be very clear about something before we go any further: you are not missing this because you're a bad parent. You're missing it because anxiety in ADHD kids almost never looks like anxiety. It looks like complaints. It looks like defiance. It looks like a kid who just doesn't want to go to school.

Why ADHD anxiety shows up in the body first

Here's the thing most pediatricians don't have time to explain: kids with ADHD are already running on a dysregulated nervous system. Their brains are constantly monitoring for threat, for change, for anything unpredictable — because unpredictability is genuinely harder for them to handle than it is for neurotypical kids.

When anxiety piles on top of that — and ADHD and anxiety co-occur in roughly 50% of kids with ADHD — their bodies absorb what their words can't express. The gut-brain connection is real and it's strong, especially in kids whose emotional regulation systems are already taxed.

Oliver couldn't tell me he was scared. He was seven. He didn't have that vocabulary. What he had was a stomach that hurt every time he felt dread.

Anxiety in ADHD kids almost never looks like worry. It looks like physical complaints, clinginess, and "bad behavior" at exactly the moments you'd least expect it.

The physical symptoms I learned to recognize over that year:

• Stomachaches or nausea on school mornings (especially before anything new or hard)
• Headaches that appeared right after school drop-off time
• Complaints of feeling "tired" or "dizzy" with no medical cause
• Increased clinginess and refusal to separate
• Frequent bathroom trips before transitions
• Skin picking, nail biting, or other body-focused repetitive behaviors that ramped up in specific situations

None of those looked like "my child is anxious." All of them looked like "my child is being difficult."

The ADHD-anxiety cycle most parents can't see

What made this so hard to catch was that the cycle was invisible to me while I was living inside it.

Oliver's ADHD made it hard for him to keep up in class. Falling behind made him dread school. Dreading school made his mornings explosive — which, as I later learned, is a very common pattern where hidden anxiety looks exactly like defiance. The explosiveness made our mornings chaotic, which made him feel even more out of control, which ramped his anxiety higher.

Round and round.

The ADHD created conditions for anxiety. The anxiety made ADHD symptoms worse — because a dysregulated, anxious brain cannot focus, cannot self-regulate, cannot do any of the things we were asking Oliver to do. And because ADHD isn't bad behavior — it's brain chemistry, nothing we tried on the behavioral side touched the root problem.

Sensory overload vs. anxiety — and why the difference matters

This is where it got genuinely confusing for me, even with my OT background.

Some of Oliver's physical complaints were anxiety. Some were sensory overload. And some were both, layered on top of each other in ways that were nearly impossible to untangle in real time.

A few distinctions that helped me:

• Sensory overload tends to escalate during or immediately after sensory-heavy environments — loud cafeterias, crowded hallways, scratchy clothing. The physical symptoms are acute and tend to resolve once the environment changes. (If this sounds familiar, this piece on sensory processing and loud noises is worth reading.)
• Anxiety tends to build in anticipation — before the hard thing, not during it. The stomachache appears Monday morning, not Monday afternoon. The headache hits at 7 AM, not 3 PM.

Timing, I found, was the most reliable signal.

What I started tracking — and what it revealed

My OT instincts eventually kicked in and I started keeping a simple log. Nothing fancy — a notes app on my phone. Every time Oliver had a physical complaint, I noted:

1. Time of day
2. What was happening or coming up
3. What the environment looked like
4. What happened next (did it resolve? escalate?)

Within three weeks, the pattern was undeniable. Stomachaches clustered around transitions, anything new, and days when his classroom routine changed. They almost never appeared on unstructured weekend mornings.

That log changed everything. Not because it gave me answers immediately, but because it gave me something concrete to bring to his pediatrician — and it helped me stop reading his physical symptoms as manipulation and start reading them as communication.

Five things that actually helped

I want to be honest: there was no single fix. But these five things, together, made a real difference over the following school year.

1. Named the feeling before the event. The night before anything hard, we'd sit together and I'd say, "Your body might feel nervous tomorrow. That's okay. Here's what we'll do if it does." Naming it in advance seemed to reduce its power.
2. Gave him a physical release before school. Ten minutes of deep pressure input — a weighted blanket, bear hugs, carrying his heavy backpack — genuinely calmed his nervous system before drop-off.
3. Created a "worry time" ritual. After school, not in the morning. We'd spend five minutes talking about whatever felt hard. Containing worry to one window reduced the all-morning dread spiral.
4. Worked with his teacher to reduce surprise. A simple weekly preview email from his teacher — just what was coming up — reduced his Monday anxiety dramatically. If you're navigating school communication, this teacher check-in template is something I wish I'd had sooner.
5. Stopped talking during the physical spiral. When he was mid-stomachache at 7 AM, that was not the moment for logic or reassurance. Stopping talking entirely — just sitting with him — worked better than anything I said.

When to loop in your pediatrician

If your child's physical complaints are frequent, severe, or causing them to miss school regularly, please bring it to your pediatrician — and bring your log.

Don't just say "he gets stomachaches." Say: "He's had stomachaches on 14 of the last 20 school mornings. They cluster before transitions and new activities. They resolve by mid-morning and never appear on weekends." That's the language that gets you taken seriously and moves the conversation toward anxiety screening rather than just GI workups.

Ask specifically about anxiety co-occurring with ADHD. Many pediatricians won't raise it unless you do. And if you're already navigating medication questions, know that anxiety is also a documented side effect of some stimulant medications — worth discussing if symptoms worsened after starting meds.

Oliver is nine now. He still gets nervous. But he has words for it, and I have eyes for it. That combination changed our mornings more than anything else.