I watched my mother pack once when I was nine. We were driving two hours to visit my grandmother for a single night. One night. She packed a full suitcase, a smaller bag inside the trunk “just in case,” a plastic bin of snacks that could have fed a family of six for a week, and a change of sheets because she wasn’t sure about Grandma’s guest room.

I remember thinking it was a lot.

I didn’t realize I’d grow up to do the exact same thing.

Last year I packed for a three-day conference and brought four pairs of shoes, two backup phone chargers, a sewing kit, and enough medication to survive a minor apocalypse. My partner watched from the doorway and said, gently, “You know they have stores there, right?”

I knew. Of course I knew. But knowing has never been the part that drives me to zip that overstuffed bag shut and haul it to the car like I’m fleeing something.

Because I am fleeing something. I just didn’t know it for the longest time. The thing I’ve been fleeing ended thirty years ago, but my suitcase never got the update.

If you’ve ever been teased for overpacking - or teased yourself, rolled your eyes at your own third backup outfit - this might land differently than you expect. Because what psychology reveals about the people who always pack too much is not a story about poor planning. It’s a story about a child who learned that the world could shift without warning, and that carrying everything was the only way to guarantee you wouldn’t be stranded with nothing.

Here are 8 things that quietly happen when that child grows up.

1. You pack for the trip you’re afraid of, not the trip you’re taking

You’re going to a beach resort for four days. Sunshine is guaranteed. You pack a rain jacket, a sweater, thermal socks, and a scarf. Not because you checked the weather and saw a cold front. Because somewhere in your body, you believe the weather could betray you.

This is what psychologists call anticipatory anxiety - the mind’s habit of rehearsing worst-case scenarios as a form of emotional preparation. A 2019 study published in the journal Emotion found that individuals with high anticipatory anxiety don’t just worry more. They physically prepare more, gathering resources and contingencies the way a body stockpiles energy before a famine.

You’re not packing for San Diego. You’re packing for the version of San Diego where everything goes wrong and nobody helps you. That version lives in your nervous system, not on any map.

2. You carry duplicates of things you’ve never once needed a duplicate of

Two toothbrushes. Two phone chargers. A backup pair of glasses you haven’t worn since 2019 but refuse to leave behind. An extra belt, because what if.

The duplication isn’t logical. It’s emotional. Every backup item is a promise you’re making to yourself - the promise that you will not be caught empty-handed the way you once were as a child, when the thing you needed wasn’t there and nobody noticed.

Children who grow up in unpredictable homes learn early that resources disappear. The electricity goes out. The groceries run low before the end of the month. The parent who was supposed to pick you up doesn’t come. You learn that the world doesn’t reliably provide, so you become your own supply chain.

By adulthood, those duplicates aren’t about toothbrushes. They’re about trust. You don’t trust the world to give you what you need when you need it. So you bring your own.

3. You feel a physical wave of anxiety if you try to pack light

You’ve tried. Maybe someone challenged you to fit everything in a carry-on. Maybe you read one of those minimalist packing lists and thought, “This year I’ll be different.”

You laid out fewer items. You told yourself it would be fine. And then the anxiety arrived - not as a thought, but as a sensation. A tightness in the chest. A low hum of dread. The feeling that you are forgetting something critical, even though you cannot name what it is.

This is your nervous system interpreting scarcity as danger. Dr. Bessel van der Kolk’s work on trauma and the body describes how early experiences of deprivation get encoded not in memory but in muscle and bone. The body remembers what the mind has forgotten. And when you try to leave the house with less than your body considers safe, it protests.

You’re not being dramatic. You’re not being silly. Your body is running a program that was written when being unprepared had real consequences.

4. You mentally rehearse disasters that have a near-zero chance of happening

While packing, your mind offers you a highlight reel of catastrophes. What if the airline loses your luggage and you’re stuck in a foreign city with nothing. What if there’s a medical emergency and you don’t have the right medication. What if the hotel doesn’t have towels. What if, what if, what if.

A 2020 study in Psychological Science found that people with histories of childhood unpredictability show heightened threat sensitivity - their brains flag more situations as potentially dangerous than people who grew up in stable environments. It’s not that you’re more anxious by temperament. It’s that your early environment calibrated your threat detector to a higher setting.

So when you’re standing in your bedroom deciding whether to pack that extra pair of shoes, your brain is not really asking about shoes. It’s scanning for every possible future in which you might be vulnerable, and it’s trying to solve all of them at once, tonight, with whatever fits in the bag.

5. You apologize for how much you bring, but you never actually bring less

“I know, I know, I’m ridiculous.” You say it at the airport. You say it loading the car. You laugh about it. You make it a personality trait, a quirky thing about you, something light.

But you never actually reduce what you bring.

The apology is a social performance. You’ve learned that the world judges over-preparers, so you preemptively disarm the judgment by naming it yourself. But the behavior doesn’t change, because the behavior was never about being reasonable. It was about surviving.

This is common in adults who developed adaptive strategies during childhood. The strategy becomes embarrassing in adulthood - it no longer “fits” - but it still feels necessary on a level deeper than logic. So you apologize for the thing you cannot stop doing, which is its own kind of loneliness.

6. Your overpacking extends far beyond suitcases

Your purse is heavy. Your car has a trunk full of “just in case” supplies. Your pantry is overstocked. Your phone has three weather apps. You carry snacks even when you’re going somewhere with food.

This is where it becomes clear that packing is not the issue. Packing is the most visible expression of a much wider pattern - what psychologists sometimes call over-provisioning, the compulsive need to have more resources available than any situation could reasonably require.

It shows up in how you plan, how you shop, how you host. When people come to your house, there’s always too much food. Always extra blankets. Always a drawer full of things a guest might need. You are building, in every room and every bag, a world where nobody will ever go without.

Because once, somebody did. And that somebody was you.

7. You feel responsible for everyone else’s preparedness too

You don’t just overpack for yourself. You pack for your partner, your kids, your friends. You’re the one who brings the extra sunscreen, the band-aids, the Advil, the phone charger that fits everyone’s phone.

And when someone else forgets something, you feel a quiet surge of validation. Not smugness - something closer to relief. See? This is why I bring everything. Because the world is unreliable and I am not.

Research on parentification - the phenomenon where children take on caretaking roles too early - shows that these children grow into adults who feel personally responsible for other people’s comfort and safety. A 2017 study in the Journal of Family Psychology found that parentified children often become hyper-responsible adults who experience guilt when they can’t anticipate and meet others’ needs.

Your overpacking for others is not generosity, though it looks like it. It’s a role you learned before you were old enough to choose it - the one who makes sure nobody gets caught without.

8. The suitcase closes, and something in you finally relaxes

Here’s the part nobody talks about. The moment the zipper closes and the bag is full and you’ve done one last mental scan and everything is accounted for - there’s a wave of calm.

Not excitement about the trip. Not anticipation. Calm. The particular calm of a nervous system that has completed its safety protocol and can finally, briefly, stand down.

This is the tell. This is how you know the overpacking was never about the items. Because the relief doesn’t come from having the right shoes or the backup charger. The relief comes from the feeling of completion - the sense that you have done everything in your power to prevent the unpredictable from catching you off guard.

It’s the same calm a child feels when they’ve checked every lock, made sure the stove is off, confirmed that everyone is home and accounted for. It’s the calm of someone who has spent their entire life bracing, and the only time the bracing pauses is when every base has been covered.

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If you recognized yourself in this list, I want to say something that might feel strange to hear.

You were a brilliant child.

You looked at a world that wasn’t giving you enough - enough stability, enough certainty, enough assurance that tomorrow would look like today - and you built a system to compensate. You became your own safety net. You learned to carry everything because nobody taught you that you could rely on the world to provide it.

That strategy kept you going. It got you through.

The only problem is that you’re still running it decades later, in a life that is probably far more stable than the one you grew up in. The suitcase is still packed for the emergency that ended a long time ago.

You don’t have to unpack all at once. You don’t have to become a minimalist or a carry-on-only traveler or any other version of a person who trusts the world effortlessly. That kind of trust wasn’t available to you early, and it doesn’t arrive just because someone tells you to relax.

But maybe, next time you’re standing in your bedroom with three pairs of shoes you know you won’t wear, you can pause. Not to judge yourself. Just to notice. To say, quietly, “I see what you’re doing. And I understand why.”

That noticing - gentle, unhurried, free of shame - is where the unpacking actually begins.