When OCD Meets PDA: Supporting Children Whose Nervous Systems Experience Demands as Threats

"I know it's OCD."

"But every time I try to help my child face it, everything explodes."

"My child isn't refusing because they don't want help. They seem genuinely overwhelmed."

These are conversations I have regularly with parents of children who experience OCD, anxiety, PANS/PANDAS and a PDA profile.

Many parents find themselves caught between two pieces of advice.

On one side they are told:

"Don't accommodate the OCD."

On the other they see a child who appears terrified, overwhelmed, dysregulated or completely unable to engage.

This can leave parents feeling stuck, exhausted and unsure how to help.

Why Traditional OCD Advice Sometimes Feels Different for PDA Children

Many children with OCD experience anxiety when asked to resist compulsions.

However, children with a PDA profile often experience something additional.

The demand itself can trigger a separate threat response.

Even when the demand is reasonable.

Even when it is intended to help.

Even when it is something they want to do.

For these children, requests such as:

• "Just put your socks on."

• "Let's try not washing this time."

• "Can you come downstairs?"

• "Let's talk about your worries."

may be experienced by the nervous system as a loss of autonomy, control or safety.

The response can look like:

• fight

• flight

• freeze

• shutdown

• panic

• aggression

• avoidance

• negotiation

• withdrawal

From the outside it can appear oppositional.

From the inside it often feels more like survival.

When OCD, PDA and PANS/PANDAS Overlap

Things can become even more complex when OCD exists alongside PANS or PANDAS.

Many children have experienced periods where their brains and bodies genuinely felt unsafe.

During acute episodes, anxiety, contamination fears, intrusive thoughts, compulsions and emotional dysregulation can increase dramatically.

Even after medical treatment helps reduce symptoms, many children remain highly sensitive to threat.

Their nervous systems may continue scanning for danger.

They may remain fearful of uncertainty.

They may continue relying on compulsions or avoidance to feel safe.

When PDA is also present, attempts to challenge the OCD can sometimes feel like yet another threat.

The child is not only experiencing anxiety about the obsession.

They may also be experiencing anxiety about being told what to do.

Understanding the Nervous System First

One of the biggest shifts for parents can be moving from:

"How do I stop this behaviour?"

to:

"What is my child's nervous system telling us right now?"

When children are in a fight, flight or freeze response, the thinking parts of the brain become less accessible.

Logic rarely works.

Reassurance often doesn't work.

Reasoning usually doesn't work.

The child is not choosing to be difficult.

Their nervous system is acting as though there is danger.

The first task is often helping the nervous system feel safe enough to engage.

Does This Mean We Should Accommodate Everything?

No.

Supporting a PDA child does not mean allowing anxiety or OCD to take over family life.

But it does mean being thoughtful about how we approach change.

The goal is not to remove every demand.

The goal is to reduce unnecessary threat whilst building flexibility, confidence and tolerance over time.

Children are far more likely to engage when they feel:

• respected

• collaborative

• understood

• autonomous

• emotionally safe

rather than controlled or coerced.

Why Flexibility Matters

Traditional approaches can sometimes sound like:

"We are doing this exposure now."

Many PDA children respond better to:

"I wonder what feels possible today?"

"What would make this feel easier?"

"How can we work with your nervous system rather than against it?"

The therapeutic goal remains the same.

The pathway simply looks different.

Rather than pushing through panic, we often focus on creating enough safety and trust for the child to take the next step voluntarily.

ACT, ERP and PDA

This is where Acceptance and Commitment Therapy (ACT) can be particularly helpful.

ACT recognises that anxiety does not need to disappear before a child can move towards what matters.

Rather than fighting thoughts and feelings, children learn:

• how to notice them

• how to make space for discomfort

• how to connect with their values

• how to take small brave steps

ERP can still be incredibly valuable.

However, many PDA children benefit from exposures being highly collaborative, flexible and autonomy-supportive.

The question often becomes:

"What challenge are you willing to take on today?"

rather than:

"You need to do this exposure."

That difference may sound small.

To a PDA nervous system, it can feel enormous.

Supporting Without Fueling OCD

Parents often worry that they only have two options:

1. Accommodate everything.

2. Force their child to face it.

In reality, there is often a middle ground.

SPACE offers a useful framework here.

Parents can remain supportive without becoming part of the OCD.

For example:

Instead of:

"Okay, let's spray it again."

A parent might say:

"I can see your brain is sounding the alarm right now. I'm here with you while we work through it."

Instead of:

"You're fine. Stop worrying."

A parent might say:

"I can see your nervous system feels unsafe. Let's figure out what might help it settle."

The message becomes:

"I understand this is hard."

while also communicating:

"I believe you can cope."

What Parents Often Need Most

Many parents of PDA children feel pressure to "get it right."

The reality is that these children often require a more nuanced approach.

Progress is rarely linear.

Some days they move forwards.

Some days they need recovery.

Some days they need connection before challenge.

And sometimes what looks like resistance is actually overwhelm.

The goal is not perfection.

The goal is helping your child gradually develop trust in themselves, confidence in their ability to cope and a nervous system that no longer feels under constant threat.

A Final Thought

When OCD, anxiety, PDA and PANS/PANDAS overlap, families are often dealing with far more than behaviour.

They are supporting a child whose nervous system may have spent months or years trying to stay safe.

Healing rarely comes from forcing children through fear.

Nor does it come from allowing fear to make all the decisions.

Often healing happens in the space between the two.

A place where children feel understood, supported and respected, whilst gradually learning:

"I can do hard things."

"I can tolerate uncertainty."

"My nervous system can feel alarmed without me needing to obey the alarm."

And perhaps most importantly:

"I am safer and more capable than my anxiety would have me believe."

With love and support

Fiona

Fiona Killick

Integrative Psychologist and Psycohotherpist

Specialist Practitioner in Anxiety, OCD, Tics and Neuroinflammtaion in Children and Young People.