If you’re the parent of an autistic child, you may notice patterns over time that raise new questions. Some experiences may feel connected to autism, while others feel different, more fear-based, or harder for your child to move past. It’s natural to want claor you rity about what’s going on and how to best support your child.

Autism is a neurodevelopmental condition that affects the way a person experiences and responds to the world. For many autistic people, rituals and repetitive behaviors can support regulation, predictability, and provide a sense of safety. Because of this, it can sometimes be hard to tell when a way of behaving is a feature of  autism and when anxiety or obsessive-compulsive disorder (OCD) may also be playing a role.

Understanding what’s behind a behavior, not just what it looks like, can make it easier to know what kind of support will be most helpful. This article explores how autism and OCD can overlap, how they differ, and what parents can keep in mind when supporting their child in ways that feel respectful and aligned with who they are.

What is OCD?

OCD is a mental health condition characterized by fear‑based obsessions and anxiety. 

OCD usually includes two parts:

  • Obsessions: Intrusive, unwanted thoughts, images, or worries that feel upsetting or scary. For children with OCD, obsessions are not just worries that come and go. For children with OCD, obsessions are not just worries that come and go. They can feel loud, hard to ignore, urgent, and stressful, even when a child knows the thoughts do not make sense. For example, a child might have repeated thoughts about getting sick or causing harm, even when there is no real danger. Some children experience intrusive images or ideas that feel shocking or confusing, including thoughts that go against their family’s values or beliefs. Others may worry intensely about germs, contamination, or whether something is “just right” or perfectly symmetrical.
  • Compulsions: Things a person feels they have to do to try to reduce that fear or prevent something bad from happening. These actions or mental rituals are not enjoyable. Instead, they feel urgent, as though something bad will happen if they aren’t completed “correctly.” For example, a child might wash their hands over and over, repeatedly check doors or backpacks, line objects up until they feel even, silently count or repeat phrases in their mind, or ask for reassurance again and again that everything is okay. Some children feel distressed if they can’t complete a compulsion a certain number of times or if they are interrupted midway through.

OCD can affect people across the lifespan and in a wide range of settings. While these behaviors may temporarily lower anxiety, the relief doesn’t last. Over time, the cycle often becomes more intense, taking up more time, energy, and emotional space. When compulsions or intrusive thoughts begin interfering with day-to-day life, making routines longer, increasing distress, or limiting participation in school, activities, or relationships, OCD may be involved. 

Autism and OCD: overlap and key differences

Some behaviors associated with autism and OCD can look very similar on the surface, even though they may serve very different purposes for a child. Understanding the function and experience behind a behavior is key to interpreting what kind of support is most helpful.

Autism and OCD are distinct experiences, but they can overlap in ways that are not always easy to interpret, particularly when similar behaviors are serving very different functions.  

Where autism and OCD can overlap

In this section, overlap refers to similarities in observable behaviors, not to shared underlying causes or mechanisms. Behaviors that look alike on the surface can have very different meanings and functions for a child.

  • Repeated behaviors: Both autistic children and people with OCD may engage in repeating actions or routines. An autistic child may flap their hands, pace, or repeat a favorite phrase because it helps them feel regulated or joyful. A child with OCD might repeat an action or phrase because they’re afraid something bad will happen if they do not.
  • Preference for routine/structure: Unexpected changes or uncertainty can be challenging for both autistic children and those with OCD. Many autistic children rely on predictable routines because they provide structure, reduce sensory overwhelm, and support regulation. In OCD, routines are often followed because of fear.
  • Anxiety: Anxiety commonly co-occurs with autism, especially in overwhelming environments. OCD-related anxiety, however, is usually tied to specific intrusive thoughts and leads directly into compulsive behaviors aimed at decreasing fear. 

From the outside, these behaviors can look very similar. Without understanding the reason behind them, it’s easy for OCD to be missed, or for autistic regulation strategies to be misunderstood as something that needs to be stopped, sometimes increasing distress or removing supports that help an autistic person feel regulated and safe. 

How autism and OCD are different

Autism and OCD can co-occur in the same child, but one does not cause the other. When both are present, it is especially important to understand how each contributes to a child’s experiences and behaviors. Even when behaviors look similar, the internal experience is often very different.

  • What’s driving the behavior:
    • In OCD, behaviors are usually driven by fear or worry about something bad happening. If a child lines up toys because they believe something bad will happen (e.g., a parent will die)  if the order isn’t “right,” fear may be driving the behavior.
    • In autism, patterns often serve as sensory support, regulation, or meaning-making. If a child lines up toys because it feels satisfying or calming, this is often an autistic regulation strategy.
  • How the behavior feels:
    • OCD-related behaviors often feel distressing, urgent, or uncomfortable, even when a child feels compelled to do them.
    • Autistic regulation behaviors are typically comforting and chosen.
  • What happens over time:
    • When compulsions are interrupted without appropriate clinical support, distress can increase. In evidence-based treatment for OCD, particularly Exposure and Response Prevention (ERP), compulsions are addressed gradually and thoughtfully by a skilled provider so that fear decreases over time rather than escalating. 
    • Interrupting an autistic regulation strategy may increase distress because the child has lost support (not because they are being rigid).

Understanding these differences helps parents and caregivers focus on the experience behind a behavior rather than only its appearance, reducing the risk that regulation is misinterpreted as a problem and that helpful supports are removed in ways that increase distress. 

Why understanding the “why” behind behavior matters

Without understanding the reason behind a behavior, it can be difficult to know how to best support your child. Regulation-supporting behaviors can be misinterpreted, while anxiety-driven behaviors may go unnoticed if they’re assumed to be part of autism.

For example, two children might both repeat a routine in the same way each day. For one child, this predictability provides comfort and helps their nervous system feel settled. For another, the routine may feel necessary (but not pleasant) because of an intense fear that something bad will happen if it’s not followed exactly. While these behaviors may look similar, the experience underneath them, and the kind of support that’s helpful, can be very difficult. Understanding whether a behavior is helping your child feel grounded or trying to reduce their fear makes a meaningful difference in how to respond.

When support is guided by the why behind behavior, children are more likely to feel safe and understood, and parents and caregivers are better able to offer support that truly meets their child where they are. 

How you can support your child

The best available intervention for OCD is something referred to by providers as Exposure plus Response Prevention or ERP, and it is the recognized ‘front line’ intervention for OCD (APA, 2024, WHO, 2024). This also is the case for an autistic person who presents with OCD and working with a provider skilled in implementing ERP with autistic individuals is important. This is because ERP may need to be modified to be effective and to ensure that it is not stress-inducing. If your autistic child is also experiencing OCD, ERP works best when it focuses on reducing fear (and any resulting compulsive behaviors) while respecting your child’s individual needs, communication style, and strengths. The pace of ERP should move at your child’s pace and should prioritize predictability, sensory safety, and collaboration.

ERP is often most helpful when it includes:

  • A slower, predictable pace so your child has time to process and feel settled 
  • Clear, concrete language that reduces uncertainty
  • Visual supports to help make expectations and transitions easier to understand
  • Accommodations for sensory needs, such as breaks, movement, or changes to the environment
  • Choice and collaboration, so your child feels involved rather than pressured

ERP works best when it builds on what already helps an autistic child feel calm and safe, while gently reducing fear and overwhelm. The goal isn’t to take away coping strategies, but to help anxiety have less control over your child’s day.

At home, parents can support their child by:

  • Noticing whether a behavior seems calming or whether it increases anxiety over time
  • Paying attention to how your child shows discomfort (through words, AAC, behavior, gestures, emotions, or changes in energy)
  • Offering reassurance in ways that feel supportive, without asking your child to push through fear before they are ready
  • Advocating for supports at school, in therapy, and in the community that respect your child’s sensory needs, communication preferences, and emotional safety

This kind of support helps address anxiety without taking away the strategies your autistic child uses to feel grounded and secure. 

Key takeaways

  • Some autistic children also experience OCD, and the two can look similar at times
  • OCD-related behaviors are usually driven by fear, while many autistic behaviors help a child feel regulated
  • Understanding why a behavior is happening can guide more helpful support than focusing on what it looks like
  • Support works best when it reduces anxiety while respecting your child’s individual needs and strengths
  • If you are concerned your child may have OCD, seek out a provider who is skilled in differentiating between OCD and autism and who is knowledgeable about how ERP may be modified to be successful for an autistic person

References

  • APA Division 12, Society of Clinical Psychology. (2024). Exposure and response prevention for obsessive-compulsive disorder. div12.org
  • National Autistic Society
  • International OCD Foundation
  • Bedford, S.A., Hunsche, M.C. & Kerns, C.M. Co-occurrence, Assessment and Treatment of Obsessive Compulsive Disorder in Children and Adults With Autism Spectrum Disorder. Curr Psychiatry Rep 22, 53 (2020). https://doi.org/10.1007/s11920-020-01176-x
  • World Health Organization. (2023). WHO guideline on mental health promotive and preventive interventions for adolescents: Helping adolescents thrive. World Health Organization. www.who.int (Note: This guideline covers specific evidence-based psychosocial interventions including CBT/ERP components).