Does Your Sleep Position Really Leave Marks on Your Face?
You wake up, look in the mirror, and there's a deep line running across your cheek where your face was pressed into the pillow all night. It fades after a while, but you start wondering if it's leaving something behind for good. A lot of people bring this exact question to Dersoma after noticing the same crease morning after morning. Here's what's actually true.
The Crease You See in the Morning Is Real
Those temporary lines have a name. They're called sleep lines, and they happen for a simple reason. When your face presses against a pillow for hours, the skin gets compressed, stretched, and pulled in one direction. A study looking at this found that side and stomach sleeping both create this kind of pressure, and over time, repeated pressure in the same spot night after night can turn a temporary crease into something more permanent, especially as skin loses some of its natural bounce with age.
Most of these lines show up on the forehead, cheeks, and around the lips, since those are the areas that end up pressed against a pillow the longest. Back sleeping avoids most of this simply because nothing is pressing on your face at all. It's one of the small, easy-to-miss details that shows up when people track their skin over time with Dersoma.
If your face also looks flat or tired rather than just creased, our guide on why skin can look dull covers the lifestyle side of that look.
The Myth: "Whichever Side You Sleep On Gets More Wrinkles Over Time"
Here's where it gets interesting. This sounds like it should be true, and almost everyone assumes it is. But when researchers actually tested it, the results didn't back it up.
In one study, 100 women were asked which side they usually sleep on, and their faces were photographed and compared side by side without anyone knowing which side was which. The result: there was no meaningful connection between the side someone preferred to sleep on and which side of their face had more wrinkles or looseness. People who always slept on their left didn't consistently show more aging on the left, and the same went for right-side sleepers.
So the specific idea that your go-to side is quietly aging that half of your face faster just isn't backed up by the one real study that checked. People asking Dersoma why one side of their face looks a little different than the other are often surprised that sleep position usually isn't the reason.
The Real Surprise: It's Probably Your Car, Not Your Pillow
If one side of your face genuinely does look a bit more weathered than the other, there's a much more likely explanation, and it has nothing to do with sleep at all. Looking closer at the same research, a specialist reviewing the results noted that many of the women had more wrinkles and sagging specifically on the left side of their face, regardless of which side they slept on.
The reason comes down to something most people never think about. When you drive, the sun comes through the driver's side window and hits the left side of your face more directly and more often than the right. Over years of commuting, that adds up to real, measurable sun damage on one side. This single habit turns out to explain why one side of the face can look different from the other far better than a pillow ever could. It's the kind of pattern that becomes clearer once you compare photos of both sides of your face over time in Dersoma.
What This Actually Means
Sleep position does cause real, temporary lines, and if you sleep on your side or stomach every single night for years, that repeated pressure can eventually contribute to permanent creases in those spots. That part is true. What isn't true is the specific idea that your preferred side is aging faster than the other. If anything looks uneven on your face, sun exposure from daily habits like driving is a far more likely cause than which side of the pillow you favor.
If you're curious whether a mark or line on your face is something new, something related to sleep, or something to keep an eye on, checking it through Dersoma is a simple way to get a clearer answer instead of guessing.
Frequently Asked Questions
Does sleeping on one side of your face cause more wrinkles on that side? A study comparing 100 women found no meaningful connection between preferred sleep side and which side of the face had more wrinkles or sagging. The idea is widely believed but not supported by that research.
Does sleep position cause wrinkles at all? Yes, temporarily at first. Side and stomach sleeping press the face into the pillow for hours, creating lines that can become more permanent over years of repeated pressure, especially as skin loses elasticity with age.
Why does one side of my face look older than the other? It's often related to sun exposure rather than sleep. Many people get more UV exposure on one side of their face while driving, which over years can make that side look noticeably different from the other.
Does sleeping on your back prevent sleep lines? Yes. Back sleeping keeps the face from being pressed against a pillow, which avoids most of the pressure that leads to sleep lines in the first place.
This article is for general educational purposes and summarizes findings from peer-reviewed research. It isn't a substitute for medical or dermatological advice.