Brain Freeze: Why It Happens & How to Stop It ❄️

Brain freeze affects roughly one in three people and has a name so long it takes longer to say than the brain freeze itself lasts. It is caused by eating cold food too fast, it is completely harmless, and it can be stopped in about ten seconds if you know what to do. TOM did not know what to do. You are about to.

Yesterday's post covered Chapter 22 in full — TOM's ice cream speedrun, the running in circles, the shouting. Today is the practical companion: a short, clear guide to what brain freeze actually is, why it happens, and exactly how to make it stop.

📖 From Chapter 22

"Brain freeze is real. And not worth the speedrun." — TOM, with feeling, having learned this the hard way.

👅

The One Trick That Stops Brain Freeze

Press your tongue firmly to the roof of your mouth and hold it there. The warmth of your tongue rewarms the palate, the blood vessel spasm that's causing the pain resolves, and the headache stops.

Works in ~10 seconds

That's the whole tip. Everything below is the science behind why it works — useful if you want to explain it to a curious child, or if you'd like to understand exactly what your body is doing when it decides that ice cream is a threat to national security.

Why brain freeze happens

When something very cold touches the roof of your mouth rapidly, the blood vessels in that area constrict and then rapidly dilate — the body's emergency response to an unexpected temperature drop. These vessels sit close to the carotid arteries that supply blood to the brain, and their sudden dilation is picked up by nearby pain receptors as a sharp headache, typically felt behind the forehead or at the temples.

The technical name is sphenopalatine ganglioneuralgia — which is, without question, the most impressive word for something caused by ice cream. The pain typically peaks within 20–30 seconds and resolves on its own within a minute or two as the vessels return to normal. The tongue technique shortens this dramatically by actively rewarming the palate from the inside.

💡 Why the Tongue Trick Works

Your tongue is warm and sits naturally against the palate. Pressing it firmly there transfers heat directly to the blood vessels that triggered the spasm, reversing the temperature drop that caused brain freeze in the first place. It's rewarming from the inside — faster and more direct than waiting for the body to sort it out on its own.

Three ways to stop brain freeze

1. Press your tongue to the roof of your mouthThe fastest and most reliable method. Hold it there firmly for 10–15 seconds. Works for most people almost immediately. No equipment required — always available, even mid-ice-cream.

2. Drink something warm or room temperatureA sip of warm water or a room-temperature drink rewarms the palate from the liquid side. Slightly slower than the tongue method but works well if you have a drink to hand. Do not drink more cold liquid — that is Option A from Chapter 22 and it makes things worse.

3. Cover your mouth with your hands and breathe warm airCup both hands over your mouth and nose and breathe in and out. The warm, moist air rewarms the palate gradually. Slower than the tongue method, but useful if you're somewhere you can't do the first two options without attracting attention.

⚡ Quick Reference — What Works, What Doesn't

👅✓ Tongue to palate

Fastest. Always available. Works in ~10 seconds.

☕✓ Warm drink

Good if you have one nearby. Room temperature works too.

🤲✓ Warm breath into cupped hands

Slower but works. Useful in public without a drink.

⏱️✓ Just wait

It resolves on its own in 1–2 minutes. Not fun, but harmless.

🍦✗ More ice cream

More cold = more brain freeze. TOM tried this. It did not help.

❄️✗ Shouting "COLD!"

No physiological effect. Just scares nearby animals.

👊✗ Punching a wall

Adds bruises. Does nothing for the headache. 0 points.

🧊✗ Cold water on face

Wrong direction entirely. More cold is never the answer here.

❄️ Five Things Worth Knowing About Brain Freeze

• It's more common in people who get migraines — around 1 in 3 people experience it regularly, but migraine sufferers are more susceptible

• It's completely harmless — the pain is real but causes no damage to the brain or blood vessels

• Cold drinks trigger it just as readily as ice cream — slushies, frozen cocktails, and cold smoothies are all common culprits

• Eating slowly is the best prevention — giving the palate time to adjust means the temperature drop is gradual rather than sudden

• It has a proper medical name — sphenopalatine ganglioneuralgia — which is worth memorising purely for the look on people's faces when you say it after a slushie

The bit worth telling kids

Brain freeze is one of those experiences that feels alarming and is completely fine — which makes it a genuinely useful thing for children to understand. Knowing that the sharp headache from ice cream is normal, harmless, and fixable in ten seconds takes the panic out of it entirely.

The tongue trick is also satisfying in exactly the way that good first aid knowledge tends to be: you do a simple thing, the problem stops, and you feel briefly like a genius. This is the correct response to brain freeze. TOM's response — circles and screaming — is the alternative.

Teach the tongue trick once and it sticks. It's one of those pieces of knowledge that costs nothing to share and is immediately useful the next time someone at the table goes quiet mid-ice-cream and then dramatically grabs their head.

Want to get latest updates on new books?

SubscRibe to our mailing list below

© 2025. All rights reserved.