If you’ve ever noticed your child’s tics spike after a sugary snack, a long stretch of screen time, or a particularly stressful day — you’re not imagining it. This is one of the most common questions I hear from families, and the answer is nuanced but important.

The short version? Yes — sugar, screens, and stress can all influence tic severity. But understanding why is what gives you the power to do something about it.

Let’s Start With Stress

Stress is the most well-established tic trigger of them all. When the body perceives stress — whether that’s a big test, a social conflict, a transition, or even excitement — it releases cortisol and adrenaline. These stress hormones activate the nervous system and can significantly increase tic frequency and intensity.

This is why tics often seem worse at the end of a school day, during homework time, or in the leadup to something big. Your child has been holding it together all day — managing sensory input, social demands, and academic pressure — and by the time they walk through the front door, the nervous system is flooded.

Here’s the important thing: stress doesn’t cause tics, but it absolutely turns up the volume.

Managing stress isn’t just about relaxation — it’s about building a nervous system that is regulated, resilient, and less reactive. That means sleep, movement, routine, and yes, what your child eats every single day.

What About Sugar?

Sugar doesn’t directly cause tics — but the relationship between sugar and tic severity is worth taking seriously, especially when we look at what sugar does to the brain and body.

When a child eats a high-sugar meal or snack, blood glucose spikes rapidly — followed by an equally rapid crash. That crash triggers a stress response in the body, releasing cortisol to bring blood sugar back up. And as we just established, cortisol and an activated nervous system are not friends to tics.

Beyond the blood sugar rollercoaster, excess sugar promotes inflammation — and emerging research suggests that neuroinflammation may play a role in tic disorders. The brain-gut connection is also significant here. A diet high in sugar and processed foods disrupts the gut microbiome, which directly impacts neurotransmitter production — including dopamine and serotonin, both of which are involved in tic regulation.

This doesn’t mean your child can never have a birthday cake. But it does mean that a diet consistently high in sugar and processed foods may be creating a neurological environment where tics have more room to thrive.

The Anti-Inflammatory Diet Connection

This is where the OT lens really comes into play — because food is one of the most powerful tools we have for supporting a calm, regulated nervous system.

An anti-inflammatory diet focuses on whole, nutrient-dense foods that reduce inflammation in the body and brain. For children and teens with tic disorders, this approach can be genuinely supportive alongside CBIT and other strategies.

Foods that support tic management:

• 🫐 Antioxidant-rich fruits and vegetables — blueberries, leafy greens, sweet potatoes, broccoli
• 🐟 Omega-3 fatty acids — salmon, sardines, walnuts, flaxseed (anti-inflammatory and brain-supportive)
• 🌾 Complex carbohydrates — oats, quinoa, brown rice (steady blood sugar, no crash)
• 🥚 Quality protein — eggs, chicken, legumes (supports neurotransmitter production)
• 🦠 Probiotic-rich foods — yogurt, kefir, fermented foods (gut-brain connection)
• 💧 Water — dehydration alone can increase nervous system irritability

Foods to minimize:

• Added sugars and high-fructose corn syrup
• Ultra-processed snacks, fast food, and artificial dyes
• Sugary drinks, juice, and energy drinks (yes, this includes coffee for you older teens and adults)
• Refined carbohydrates — white bread, crackers, packaged snacks

Small, consistent dietary shifts over time can make a meaningful difference in how regulated your child’s nervous system feels day to day — and a calmer nervous system means fewer opportunities for tics to escalate.

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Want to understand every factor driving your tics — and what to do about each one? The Empower Your Brain and Body Workbook covers the gut-brain connection in depth alongside nutrition, supplements, sleep, movement, sensory processing, and daily routines — everything you need in one comprehensive 68-page guide for just $47.

Get Instant Access — $57 →

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Now For Screens — The Science Is Interesting

Screen time and tics is a topic that comes up constantly, and the science behind it is genuinely worth understanding.

Research has shown that fast-paced, highly stimulating screen content — think action-heavy video games, rapidly changing YouTube videos, and short-form content like TikTok — activates the brain’s dopamine reward system intensely and repeatedly. This kind of overstimulation can dysregulate the nervous system, increase arousal levels, and create the exact neurological conditions where tics tend to escalate.

There’s also a blue light factor. Screens emit blue light that suppresses melatonin production — the hormone that signals to the brain that it’s time to wind down. Poor sleep quality is one of the most consistent tic aggravators I see in my clients. When sleep suffers, the nervous system becomes more reactive, and tics almost always follow.

One more layer: screens are often used as a way to decompress — but passive, high-stimulation screen time doesn’t actually regulate the nervous system. It can feel relaxing in the moment while simultaneously keeping the brain in an activated state.

This doesn’t mean screens are the enemy. It means the type of content and the timing of screen use matters. Slower-paced content, time limits, and a screen-free wind-down period before bed can make a noticeable difference for many families.

Putting It All Together

Sugar, screens, and stress don’t cause tics — but they all influence the nervous system in ways that can turn up the volume on tic severity. And the good news is that all three are areas where small, consistent changes can add up to real results.

As an Occupational Therapist, this is exactly the kind of whole-person approach I bring to every client. CBIT is the gold-standard treatment for reducing tics — and when we pair it with attention to sleep, nutrition, stress regulation, and screen habits, families tend to see even greater progress.

You don’t have to overhaul everything overnight. Start with one area — maybe swapping the afternoon sugary snack for something with protein and healthy fat, or building in a 30-minute screen-free wind-down before bed. Small steps, consistently applied, retrain the body and brain over time.

Ready to Go Deeper?

If you’re ready to take a whole-person approach to managing your child’s tics — one that goes beyond just the behavioral strategies — I’d love to work with you or your family.

👉 Schedule a Free Discovery Call or learn more about the Tic Tamer Lab, my 8-week group CBIT program, at three23therapy.com

Want to understand every factor driving your tics — and what to do about each one? The Empower Your Brain and Body Workbook covers the gut-brain connection in depth alongside nutrition, supplements, sleep, movement, sensory processing, and daily routines — everything you need in one comprehensive 68-page guide for just $47.

Get Instant Access — $57 →

Read my blog on Understanding the Neurological Process of Tics to learn more of the science.

Peace + Blessings,

Emily Reid, OTR/L

Occupational Therapist, CBIT and Child Anxiety Specialist