When a Sudden Change in Your Child’s Mood is a Message from Their Immune System

As a child psychologist with over 35 years of experience, I’ve encountered countless cases of children who suddenly develop anxiety, obsessive worry, and even physical symptoms like tics and meltdowns. However, in some cases, these sudden changes in behavior are not rooted in psychology but rather in a medical condition known as PANDAS (pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections) or PANS (pediatric acute-onset neuropsychiatric syndrome).

These conditions occur when a strep infection or another illness triggers the immune system to mistakenly attack the brain, producing sudden and severe symptoms. In this article, we’ll explore the connection between PANDAS and PANS and the importance of seeking a proper medical diagnosis for your child’s anxiety.

The Difference Between Real Overthinking and PANDAS

Ordinary overthinking develops gradually, often as a result of a child’s personality, temperament, or life experiences. However, PANDAS and PANS symptoms appear suddenly, without any warning signs or history of anxiety. Parents often describe their child’s behavior as ‘overnight,’ with a sudden shift from being easy-going to becoming consumed by obsessive worry or fear.

The key difference between real overthinking and PANDAS is the speed at which symptoms appear. While ordinary overthinking can develop slowly, PANDAS symptoms can manifest in a matter of days or even hours. This rapid onset of symptoms is a crucial indicator that something more serious may be at play.

Symptoms of PANDAS and PANS

The symptoms of PANDAS and PANS can be severe and debilitating, including:

• Obsessive worry or fear
• Handwriting regression
• New tics or motor symptoms
• Drastic mood swings
• Food restriction or avoidance

It’s essential to note that these symptoms can be mistaken for ordinary anxiety or overthinking. However, if your child’s symptoms appear suddenly and without warning, it’s crucial to seek medical attention from a pediatric neurologist or PANDAS/PANS specialist.

Austin’s Story: A Case of PANDAS

I’d like to share the story of Austin, a 10-year-old boy who developed sudden symptoms of PANDAS after a strep infection. His pediatrician wasn’t initially concerned, but a specialist eventually connected his symptoms to the strep infection. With antibiotics and anti-inflammatory treatment, Austin’s symptoms resolved within two weeks.

Austin’s story highlights the importance of seeking a proper medical diagnosis for your child’s anxiety. While ordinary overthinking may require coaching and therapy, PANDAS and PANS require medical attention to resolve the underlying condition.

The Takeaway

Most overthinking is exactly what it looks like: a worried mind that needs coaching, not medicine. However, every parent deserves to know that occasionally, the switch really did just flip—and the fastest path back to their child isn’t a mindset shift. It’s a proper medical diagnosis.