Last reviewed October 2026. This article is general education and is not a diagnosis or a substitute for care from your child’s providers.

Your child refuses to get in the car, goes silent at the dinner table, or asks “Are we still going?” for the fifth time in ten minutes. It is easy to read that as defiance, stubbornness, or attention seeking. For many children with autism, the real driver is anxiety, and the behavior is the visible part of a worry the child cannot put into words.

Autism and anxiety frequently occur together. A large meta-analysis found that about 4 in 10 young people with autism had at least one anxiety disorder, a rate meaningfully higher than that seen in typically developing children. Many parents never hear this until a child has been struggling for a long time.

At Achieve ABA Therapy Group, our team treats behavior as communication. We help Colorado families figure out what a behavior is protecting their child from, then build the skills and supports that make the world feel more manageable. This article explains the signs to look for, what helps at home, and when to bring in more support.

Why Autism and Anxiety Often Occur Together

Anxiety is not a character flaw or a parenting failure. Children with autism often live in a world that is less predictable and more intense than it looks from the outside. That combination can make worry a daily companion.

What the research shows

A meta-analysis of 31 studies covering more than 2,000 young people with autism found that 39.6% had at least one anxiety disorder. The most common were specific phobia (29.8%), obsessive-compulsive disorder (17.4%), and social anxiety disorder (16.6%). Estimates vary depending on how anxiety is measured, so these numbers are best read as a range, not a rule.

The CDC’s list of autism signs and related characteristics includes anxiety, stress, or excessive worry, along with upset over minor changes and unusual reactions to sounds, smells, tastes, and textures.

Why the autism experience can fuel worry

Several features of autism can make uncertainty harder to tolerate. Unspoken social rules can be confusing. Sensory input such as noise, crowds, or bright lights can be overwhelming. Changes in plans can feel like losing the map. When a child also has limited ways to say “I’m scared,” the worry has nowhere to go except into behavior.

None of these factors cause anxiety on their own. Together they help explain why a child who seems rigid or reactive may be working very hard to stay safe.

 

Eight Signs of Autism and Anxiety Parents May Mistake for Behavior

The CDC notes that anxiety can make children irritable and angry, and that some anxious children keep worries to themselves, so the symptoms can be missed. In children with autism, who may also have fewer ways to describe feelings, the signs are even easier to misread. The table below pairs what parents commonly see with what anxiety may be saying underneath.

What you see	What anxiety may be telling you
Refusing to go places or start tasks	Avoiding something feared or uncertain
Going silent or shutting down	Overwhelm and a freeze response
Meltdowns around changes	Loss of predictability feels unsafe
Asking the same question repeatedly	Seeking reassurance to quiet a worry
Rigid rules and rituals	Using control to feel safe
Clinginess or refusing to separate	Fear about what happens when you are gone
Stomachaches, headaches, or poor sleep	Anxiety showing up in the body
Irritability or a “short fuse”	Anxiety expressed as anger

A single sign does not mean anxiety. Look for patterns, especially when a behavior is new, getting stronger, or tied to specific situations.

Avoidance and refusal

Avoidance works in the short term, which is exactly why it sticks. When a child refuses a feared situation and the situation goes away, the child learns that refusing makes the fear stop. Over time, the list of feared situations can grow.

Medical visits, haircuts, and dental appointments are common hard spots, and we share ideas in our post on preparing for appointments. Preview what will happen, in what order, and what the child can do if it gets hard.

Shutdowns and meltdowns

A shutdown looks like withdrawal, silence, or going limp. A meltdown looks like crying, yelling, or lashing out. Both can be a response to being overwhelmed, and neither is a choice the way a tantrum to get a toy might be.

Many children hold things together at school and release it at home, which can make a hard evening look like misbehavior. Our posts on masking and after-school meltdowns explain why the people closest to a child often see the hardest moments.

Reassurance-seeking and repeated questions

Asking “Are we going to be late?” or “Will it be loud?” over and over is a classic sign of anxiety. Each answer brings brief relief, and then the worry returns, so the child asks again. The cycle can wear out the whole family.

Answering every time often keeps the loop going. We explain this and other well-meant traps in our post on common parenting mistakes, along with what to try instead.

Transitions and changes in plans

Leaving the house, switching activities, and unexpected changes ask a child to let go of what they expected. For a child who relies on predictability, that can feel like falling. The meltdown at the door is often about the unknown, not about the shoes.

Warnings, countdowns, and visual previews of what comes next lower the uncertainty. They do not remove every hard moment, but they can shrink the size of the drop.

Rituals, rigid rules, and the need for control

Insisting that things be done a certain way can be about more than preference. Rituals and rules can make a frightening world feel manageable. Repeated movements and special interests may also increase when a child is anxious.

Food can become part of this pattern. If you notice a very narrow list of accepted foods alongside strong distress, our post on food selectivity can help you tell ordinary picky eating from something that needs support.

Sorting Out Anxiety From Other Causes

Anxiety is a strong possibility, not the only one. Pain, hunger, sleep problems, sensory overload, and frustration over communication can all produce the same behaviors. The CDC also notes that some signs of anxiety in children can come from other conditions, such as trauma.

Four questions to ask when behavior changes

When a behavior is new or getting worse, these questions help you narrow the cause:

• What happened right before it started?
• What did the behavior help my child avoid or get?
• Has anything changed, such as school, routine, sleep, health, or a new sensory environment?
• What would my child say right now if they had the words?

Writing down answers for a week often reveals a pattern that is hard to see in the moment.

Rule out the physical and the sensory first

The CDC lists gastrointestinal issues and unusual sleep among characteristics seen in autism. Stomachaches, constipation, or poor sleep can both cause distress and be a sign of it. If a behavior change comes with physical symptoms, a visit to your pediatrician is a sensible first step.

Pain a child cannot describe can look like anxiety or aggression. Checking for ear infections, dental pain, and other discomfort is worth doing before assuming the cause is emotional.

What Helps at Home

You do not need to be a clinician to lower your child’s anxiety. Small, steady changes in how the day feels can make a real difference. The goal is a world that feels more predictable and a child who has more ways to ask for help.

Make the day predictable

Visual schedules, simple previews, and consistent routines reduce the number of surprises. Tell your child ahead of time what will happen, what will be loud or crowded, and when it will end. If plans must change, say so early and calmly, and show what stays the same.

Answer worries with a plan, not an endless loop

If your child asks the same question repeatedly, try answering fully once, then offering a written or picture version they can check on their own. A short script such as “I already answered, so let’s look at the card” can replace repeated answers without feeling dismissive. Pair it with something calming to do while the worry passes.

Give your child a way to say “I’m worried”

Many children cannot name what they feel. A simple feelings chart, a “worry card,” or a break signal gives them another route. For children who are nonspeaking or use few words, pictures or a speech-generating device can carry the message.

Praise the use of the tool, even when the worry is large. Asking for a break is a skill, and it is worth reinforcing.

Take small steps toward feared things

Avoiding everything a child fears tends to keep the fear alive. The CDC notes that behavior therapy for anxiety may involve helping children cope with symptoms while gradually exposing them to feared situations. Gradual means small steps, at the child’s pace, with support, and never forcing a child through something terrifying.

Ask your provider to help you build a step-by-step plan, and celebrate each small win.

When to Get Professional Support

Everyday worry is part of childhood. Persistent or extreme fear that interferes with school, home, sleep, or eating deserves attention. The CDC says the first step is to talk with your child’s primary care provider or a mental health specialist about an evaluation.

Signs it may be time

Consider reaching out if you notice:

• Worry or avoidance that is growing or lasting for weeks
• Refusing school or other daily activities
• Regular stomachaches, headaches, or sleep problems tied to worry
• A sudden change in mood, behavior, or skills
• Your child saying they are scared, sad, or hopeless

Who can help in Colorado

A strong team often includes your pediatrician, a psychologist or therapist who has experience with autism, a speech-language pathologist if communication is limited, and a behavior analyst for day-to-day skills.

The CDC notes that cognitive-behavioral therapy is one approach used for anxiety, particularly in older children, and the U.S. Preventive Services Task Force recommends screening for anxiety in children ages 8 to 18.

School can be part of the plan too. For children under 3, Early Intervention Colorado takes referrals at 833-733-3734, and from age 3, your local school district can evaluate how anxiety is affecting learning.

If your child is in crisis

If your child talks about wanting to hurt themselves or not wanting to live, or if you worry about their safety, get help right away. Call or text 988 to reach the 988 Colorado Mental Health Line, which connects with Colorado Crisis Services, or call 911 in an emergency. You do not need to figure out the cause first.

How ABA Supports Children With Autism and Anxiety

ABA is not a mental health treatment for anxiety disorders and does not replace therapy or a medical evaluation. 

A behavior analyst can address the behaviors that anxiety drives and teach skills that make hard situations easier. The strongest results come when your ABA team, your pediatrician, and any mental health provider share goals.

Finding what the behavior is doing

We start by looking at what happens before and after a behavior. A refusal might be avoiding a feared situation. Repeated questions might be seeking reassurance. When we understand the purpose, we can teach a safer, more effective way to meet the same need.

Teaching coping, communication, and flexibility

Skills we often build include asking for a break, tolerating a short wait, handling a small change, and using calming strategies. We reinforce effort and fade our help over time. We never force a child through a feared situation, and we move at a pace the child can manage.

Partnering with parents and the care team

You are the most consistent person in your child’s life, so we teach you the same strategies. Parent training shows you how to respond to worry the same way across the day. Settings matter too, and we can work in several of them:

• In-home ABA for anxiety around morning, mealtime, and bedtime routines
• Early intervention ABA for children under six
• School-based ABA and back-to-school ABA for classroom transitions
• Daycare-based ABA for worry around drop-off and group routines
• Weekend ABA for families who need Saturday or Sunday sessions

We also provide group home ABA for individuals living in group home settings. Please contact us to confirm availability in your area, and see our diagnosis page if you are still seeking answers about autism.

Autism and Anxiety Support Across Colorado

We support families across the Front Range, Northern Colorado, and Southern Colorado, and our locations page lists more communities we serve.

Central and west metro

In Denver, Aurora, and Lakewood, families can reach our team to talk through what they are seeing. We also serve Arvada, Englewood, and Centennial.

North of Denver

Families in Westminster, Thornton, and Broomfield can contact us, as can families in Boulder and Longmont.

Farther north, we serve Loveland, Fort Collins, and Greeley.

South metro and Southern Colorado

In Parker and Castle Rock, families can connect with our team. We also serve Colorado Springs and Pueblo. If your community is not listed, reach out anyway, because we serve many other areas of the state.

Next Steps for Autism and Anxiety

If autism and anxiety are part of your child’s story, start with curiosity about what the behavior is protecting your child from. Keep a short log for a week, noting what came before each hard moment and what helped. That record turns a stressful pattern into something you and your providers can work with.

Anxiety can ease with understanding, predictable routines, and small, steady steps. Your child is not choosing to make life hard, and you are not failing by not having seen it sooner. Support is available, and it works best when it starts with what your child is feeling.

When you are ready, contact our team or complete our intake form. We are happy to talk through what you are seeing, explain how ABA works, and answer questions about insurance.

Frequently Asked Questions About Autism and Anxiety

How common is anxiety in children with autism?

Research reviews find that about 4 in 10 children and teens with autism have at least one anxiety disorder, with one meta-analysis reporting 39.6%. Estimates vary depending on how anxiety is measured.

How can I tell anxiety from a behavior problem?

Look at what happens right before the behavior and what it helps your child avoid or get. Anxiety often shows up as avoidance, repeated questions, shutdowns, irritability, or physical complaints, and it tends to be tied to specific situations. A professional evaluation can confirm the cause.

Why does my child ask the same question again and again?

Repeated questions are often reassurance-seeking. The answer brings brief relief, and then the worry returns. Giving one clear answer, then offering a written or picture reminder, can help break the loop.

Can ABA help with anxiety?

ABA can address avoidance and teach coping, communication, and flexibility skills, working alongside your child’s other providers. It is not a substitute for therapy such as cognitive-behavioral therapy or for a medical evaluation.

Should I let my child avoid what scares them?

Short-term accommodations can help a child feel safe. Over time, avoiding everything feared can strengthen the fear, so gradual, supported steps are usually recommended. A provider can help you build a plan at your child’s pace.

When is it urgent?

If your child talks about hurting themselves or not wanting to live, or if you worry about their safety, call or text 988 for the 988 Colorado Mental Health Line, or call 911 in an emergency.

Sources

• Centers for Disease Control and Prevention. (2026). Anxiety and depression in children. https://www.cdc.gov/children-mental-health/about/about-anxiety-and-depression-in-children.html
• Centers for Disease Control and Prevention. (2024). Signs and symptoms of autism spectrum disorder. https://www.cdc.gov/autism/signs-symptoms/index.html
• Centers for Disease Control and Prevention. (2025). Data and statistics on autism spectrum disorder. https://www.cdc.gov/autism/data-research/index.html
• National Institute of Mental Health. (2024). Autism spectrum disorder. https://www.nimh.nih.gov/health/topics/autism-spectrum-disorders-asd
• van Steensel, F. J. A., Bögels, S. M., & Perrin, S. (2011). Anxiety disorders in children and adolescents with autistic spectrum disorders: A meta-analysis. Clinical Child and Family Psychology Review, 14(3), 302-317. https://doi.org/10.1007/s10567-011-0097-0
• Colorado Department of Early Childhood. (n.d.). Early Intervention Colorado. https://www.eicolorado.org/
• Colorado Behavioral Health Administration. (n.d.). Colorado Crisis Services. https://coloradocrisisservices.org/