Anxiety and ADHD in Kids: Calmer Brains, Brighter Days

You've done everything right. You've gone to the meetings. You've tried the reward chart, the calm-down corner, the books, maybe medication. And your child still can't fall asleep. Still comes apart over a sock seam. Still can't get through dinner without the whole table going sideways.

You've been told it's normal for this age. You've been told he'll grow out of it. You've been told she's just an anxious kid. But you're the one awake at 11pm still looking, so some part of you already knows something is being missed. There is no judgment here in looking for more.

Here is what I see over and over. Anxiety and attention struggles almost never live in the brain by itself. They live in a body. A body that isn't sleeping. A body that isn't breathing well at night. A body running on toast and juice by three in the afternoon. When the body is running on empty, the brain does what any brain does under stress. It gets loud, or it gets scattered, or both.

What do parents ask me most about this?

Short answers first. The full reasoning is below.

Is it normal for anxiety and ADHD to show up together?

If your child has both, you are not imagining it. Anxiety is one of the most common conditions that shows up alongside ADHD. Anxiety is a body stuck in alarm and ADHD is a brain that struggles to hold a task, so a child in alarm looks even less able to focus.

Which of the Foundational Five do you start with?

Sleep, because when sleep is off, everything is off. Then airway, nutrition, hydration and movement.

Why do you keep asking about snoring?

Because it is the thing that gets missed the most. Snoring in a child is not cute and it is not normal, and neither is mouth breathing or night sweats. A child who cannot breathe well at night does not act sleepy, he acts wired and oppositional.

What is the fastest change we can make at home?

Blood sugar. A breakfast that is mostly quick carbs sends a child up and then down. Protein and fat at breakfast, every time, is the change most families feel first.

What should I do before ordering any testing?

Give me two weeks of the best tool you already own, which is your own eyes. Families often discover the 4pm meltdown is really a 7am breakfast problem.

Anxiety and ADHD often travel together

If your child has both, you are not imagining it. When researchers pooled the studies, anxiety turned out to be one of the most common conditions showing up alongside ADHD in kids.1 They ride together often enough that working on one and ignoring the other usually leaves you stuck.

Here is the plain version of why. Anxiety is a body stuck in alarm. ADHD is a brain that has a hard time holding on to a task and filtering out noise. A child in alarm can't filter. A child who can't filter feels out of control, and feeling out of control is frightening. So the two feed each other in a loop.

That is why I don't chase symptoms one at a time. I go looking for whatever is keeping the whole system revved up. And to be clear, I work in conjunction with therapies, therapists and specialists, not as a replacement for them. My job is the medical layer underneath, so their work has a chance to stick.

I start with the Foundational Five, every time

Before any testing, and before anything from a bottle, I look at five things: sleep, airway, nutrition, hydration and movement. I call them the Foundational Five. If those aren't in place, nothing else I do matters much. Testing a child whose body hasn't slept well in three years mostly tells me I'm looking at a tired child.

Sleep

Sleep is where I start, because when sleep is off, everything is off. When researchers pooled the sleep studies, sleep problems were far more common in children with ADHD than in children without it.2 And short sleep makes attention, mood and frustration tolerance worse in any child, diagnosis or not.

What to watch at home: how many minutes from lights out to actually asleep, how often he's up, whether she wakes at the same time every night, and what he is like in the first ten minutes of the morning. Write it down for a week. That week of notes tells me more than most questionnaires do.

Airway

This is the one that gets missed the most. Snoring in a child is not cute and it is not normal. Neither is mouth breathing, night sweats, grinding teeth, or a kid who sleeps with his head tipped way back.

A child who can't breathe well at night doesn't act sleepy the way an adult does. He acts wired. He acts oppositional. He can't focus at 10am. It looks a great deal like ADHD. If your child snores with gasping or pauses in breathing, that needs a medical evaluation now, not at the next well visit.

Nutrition

Blood sugar is the fastest change most families can make. A breakfast that's mostly quick carbs, cereal, toast, juice, a granola bar, sends blood sugar up and then straight back down. In one study, children who ate a lower glycemic breakfast held their attention better through the morning than children who ate a high glycemic one.3 That crash lands right in the middle of the school day.

The fix isn't complicated. Protein and fat at breakfast, every time. Eggs, meat, full fat yogurt, nut butter, leftovers from dinner. Something that holds. Then look at artificial dyes and hidden sugar. In a randomized, placebo-controlled trial, mixes of artificial food colors increased hyperactive behavior in children in the general community, not only in children who already had a diagnosis.4 That's worth knowing before you buy the blue drink.

Hydration

Kids under-drink, and then their bodies pull water from wherever they can. That shows up as constipation, headaches, afternoon crashes and harder meltdowns. Water first thing in the morning, water in the backpack, water before screens. This one costs nothing.

Movement

Movement isn't a reward for finishing homework. It's part of the plan. When researchers pooled exercise trials in children with ADHD, physical activity improved attention and other core symptoms.5 What matters most is that it happens daily and that your child doesn't hate it. Ten minutes outside before school beats a sport they dread.

The gut and the brain talk all day

Your child's gut, immune system and brain are closely linked and in constant conversation. When the gut is out of balance, the ripples show up everywhere else: mood, sleep, focus, skin. What a child eats shapes the community of bacteria living in the gut, and that community influences the signals traveling up to the brain.6

This isn't abstract. A child who is constipated, gassy, bloated, or only pooping every third day is carrying a low grade physical misery all day long and often can't tell you about it. That misery comes out as a hard afternoon.

Things I'd want to hear about: poop frequency and what it actually looks like, tummy aches that show up on school mornings, eczema or rough patches of skin, breath that's off, and picky eating that keeps getting narrower instead of wider. Fiber-rich food and fermented food do a lot of this work. If your child is already taking probiotics, tell me what changed and what didn't.

What you can watch this week

Before you buy anything or order anything, give me two weeks of the best tool you already own, which is your own eyes. Track these things: how long from lights out to asleep, what time she wakes in the night, whether he snores or breathes through his mouth, what breakfast was and what the 10am report from school looked like, poop and how often, how much water, whether they moved their body that day. And the hard moments, what time they hit and what happened right before.

Patterns show up faster than parents expect. Families often discover the 4pm meltdown is really a 7am breakfast problem. I turn to the parent as the true expert of their child, and this is exactly why.

When testing makes sense

After the foundations are in place. Not before. If we've steadied sleep, breathing, food, water and movement and your child is still struggling, then testing earns its place, and I can read it against a body that isn't just exhausted.

Depending on your child, that might mean looking at iron stores, a basic metabolic panel with a fasting glucose, gut and microbiome testing, or organic acids testing when the picture calls for it. Testing, not guessing. And when a family's budget means choosing one test over another, I'll tell you honestly which one I'd pick first.

What I won't do

A lot of functional medicine practices get a bad rap because they layer in twenty or thirty supplements at once for a kid. I don't work that way. Food does the heavy lifting. Anything else is chosen for your child specifically, guided by what testing actually showed, for as long as they need it and no longer.

And I'll never tell you this is just how it is. More often than not, that's not true.

You don't need a perfect week. You need one change that holds. Start with sleep and breakfast, then tell me what shifted.

Written by Dr. Amy Patton, Founder Happy Kid Functional Medicine

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About the author

This article was written by Dr. Amy Patton, DNP, APRN, CPNP-PC, FMACP, a board-certified pediatric nurse practitioner and functional medicine provider serving Omaha-area families through Happy Kid Functional Medicine. Dr. Patton specializes in root-cause pediatric care for children's gut health, sleep, behavior, nutrition, immune patterns, and whole-child wellness. She sees patients in person in Omaha and by telehealth across Arizona, Colorado, Iowa, Nebraska, Tennessee, and Virginia.

References

1. Njardvik U, Wergeland GJ, et al. Psychiatric comorbidity in children and adolescents with ADHD: A systematic review and meta-analysis. Clin Psychol Rev. 2025;118:102571.

2. Xian P, Sheng X, et al. Sleep dysregulation in ADHD children: a systematic review and meta-analysis. Psychol Med. 2025;55:e321.

3. Micha R, Rogers PJ, et al. The glycaemic potency of breakfast and cognitive function in school children. Eur J Clin Nutr. 2010;64(9):948-957.

4. McCann D, Barrett A, et al. Food additives and hyperactive behaviour in 3-year-old and 8/9-year-old children in the community: a randomised, double-blinded, placebo-controlled trial. Lancet. 2007;370(9598):1560-1567.

5. Sun W, Yu M, et al. Effects of physical exercise on attention deficit and other major symptoms in children with ADHD: A meta-analysis. Psychiatry Res. 2022;311:114509.

6. Berding K, Vlckova K, et al. Diet and the Microbiota-Gut-Brain Axis: Sowing the Seeds of Good Mental Health. Adv Nutr. 2021;12(4):1239-1285.

Medical disclaimer: This article is educational and is not medical advice. It does not diagnose, treat, or replace individualized care from your child's pediatrician or licensed medical provider. Supplement types, doses, and combinations should be selected with a qualified clinician who knows your child's full history — never start a new supplement based on a blog post alone. Always consult your pediatrician before making changes to your child's routine, and seek prompt medical care for snoring with gasping or pauses in breathing during sleep, or for any severe, sudden, or concerning symptom.