When Your Child Suddenly Develops OCD, Anxiety or Tics - Elisabeth McKay - Decoded Podcast

When Your Child Suddenly Develops OCD, Anxiety or Tics

Parenting

September 3, 2026

What if your child seemed completely normal—and then, within days, became a completely different person?

Sudden OCD. Severe separation anxiety. Food restriction. Tics or unusual movements. Sleep disruption. Frequent urination. Explosive behavior. Developmental regression. Even symptoms that appear irrational, obsessive, or psychiatric.

S3 EP. 004

In this episode of Decoded, Elisabeth McKay breaks down PANS and PANDAS—two controversial areas of pediatric neuropsychiatry that force us to ask a critical question: Are we mistaking psychiatric symptoms for the origin of the problem?

PANS stands for Pediatric Acute-Onset Neuropsychiatric Syndrome. PANDAS refers specifically to Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections. But understanding the labels is only the beginning.

Elisabeth examines how sudden behavioral deterioration can potentially emerge from multiple directions. In some cases, psychological and environmental inputs may be involved. In others, infection, immune activity, inflammation, mold toxicity, or another medical process may warrant investigation. And sometimes, multiple factors may be operating at once.

In this episode:

  • What PANS and PANDAS actually mean
  • The defining importance of sudden symptom onset
  • OCD, food restriction, anxiety, aggression, regression, tics, and sleep changes
  • The history of PANDAS and its association with Group A strep
  • Why PANS is broader than PANDAS
  • Basal ganglia circuitry and the proposed immune hypothesis
  • Why there is currently no single definitive PANS biomarker
  • What the American Academy of Pediatrics has said about PANS
  • PANS vs. autoimmune encephalitis
  • Why psychiatric symptoms don’t automatically prove psychiatric origin
  • Psychological and environmental “perfect storm” events
  • Mold toxicity and other potential environmental factors discussed in the episode
  • How parental behavior during illness can affect a child’s interpretation
  • Why parents should document patterns without catastrophizing
  • What information can make conversations with clinicians more productive
  • Why medical investigation and behavioral support don’t necessarily have to be either/or

The goal isn’t to diagnose your child from a podcast.

It’s to stop confusing the description of an output with an explanation of its mechanism.

When a child’s functioning changes rapidly, the question isn’t simply, “What psychiatric label fits these symptoms?”

It’s also: What changed—and where did this process actually begin?

Watch, observe carefully, document what you can, and work with qualified clinicians when medical evaluation is warranted.



SHOW NOTES

00:00 – When Your Child Suddenly Becomes a Different Person

07:00 – Psychological Triggers vs. PANS and PANDAS

14:00 – What PANS and PANDAS Actually Mean

21:00 – The Diagnostic Fingerprint Parents Should Know

28:00 – Strep, the Immune System, and the Basal Ganglia

35:00 – Why PANS Remains Medically Controversial

42:00 – PANS vs. Autoimmune Encephalitis

49:00 – When Psychiatric Symptoms May Have a Medical Origin

56:00 – The Environmental and Emotional Perfect Storm

01:03:00 – What Parents Should Track Before They Panic

01:10:00 – How to Bring Better Evidence to Your Doctor

01:17:00 – Medical Treatment vs. Behavioral Intervention

01:24:00 – How to Think About PANS and PANDAS

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