TL;DR
Smile lines in your 20s are almost always dynamic, meaning they appear when you smile and disappear when you don’t. That’s normal facial anatomy, not aging. Daily SPF, a sensible retinoid, and not sleeping face-down are the entire prevention program. Filler, threads, and aggressive in-clinic work in your 20s is mostly money toward problems you don’t have yet.
A 23-year-old shows me her phone, zoomed in on a parenthesis-shaped crease beside her mouth, and asks whether she needs filler. She’s smiling in the photo. The crease disappears when she stops. This is the most common consult I’m having right now with people under 30, and the honest answer is one nobody enjoys: those aren’t aging lines, those are smile lines doing their job. Lifelong prevention is real and worth a small daily effort. Panic in your 20s is not.
What you’re actually looking at
Nasolabial folds (the curved lines running from the side of the nose to the corner of the mouth) are anatomy, not damage. They exist on infants. They exist on every face from every angle. The fold is where the upper lip levator muscles attach to the skin, and every smile lifts that point, creating the crease.
Static versus dynamic is the whole distinction.
A dynamic line appears with movement and vanishes at rest. A static line persists when your face is relaxed and neutral. In your 20s, the parenthesis around your mouth should be dynamic. If you can’t see it in a mirror with a fully relaxed face, you don’t have early smile lines yet; you have functional anatomy. TikTok zooms and front-camera angles flatten and exaggerate them, which is a real reason this fear has spread.
What’s worth watching: do the lines stay etched after 30 to 60 seconds of relaxed face? That’s the early signal of a static line beginning to form, and that’s the window where prevention earns its keep.
Why some 20-somethings genuinely get static lines
A few situations skew younger. Significant weight loss (more than 15 to 20 pounds quickly) reduces midface volume and exaggerates the fold. Heavy UV exposure breaks down dermal collagen along the cheek where the line lives. Side sleeping on the same side every night for years deepens the dominant-side fold. Smoking and vaping (the rapid weight changes and the repetitive lip-pursing both contribute). Connective tissue conditions (Ehlers-Danlos, joint hypermobility) where collagen behaves differently. A subset of people simply have stronger zygomaticus muscles or naturally less midface fat, and they line earlier without doing anything wrong.
None of these are character flaws. They’re anatomy and behavior interacting.
What actually helps in your 20s
The whole prevention program fits on an index card. Daily broad-spectrum SPF 30 or higher, applied to the full face including the nasolabial area (people skip the fold, then wonder why it ages faster). A retinoid in some form, started gently; bakuchiol if you want to ease in, adapalene if you want real evidence, tretinoin if you’re committed. Hydrating skincare that includes peptides; our Microbiome Glow Serum layers cleanly here. Sleeping on your back if you can train yourself, because chronic side compression of the same fold for 25 years adds up.
Vitamin C in the morning. A barrier-friendly moisturizer at night. That’s it. That covers 90 percent of the prevention work.
For the small static lines that appear in late 20s or early 30s, the next-step tools are gentle: peptide-rich serums, prescription-strength retinoid (tretinoin 0.025 to 0.05 percent), and occasional in-clinic support like microneedling or low-energy radiofrequency. None of this is urgent. None of this needs to be done by 25.
What’s overkill and probably harmful
Filler in your 20s for dynamic smile lines is mostly bad medicine. Filler placed too superficially or in too much volume changes how your face moves over time, and undoing migrated filler is more expensive than placing it. Thread lifts in your 20s solve nothing and scar tissue from threads complicates later work. Aggressive ablative laser is not for healthy 20-something skin. Botox along the nasolabial fold is technically possible in tiny doses but most experienced injectors won’t do it at this age because the muscle work is needed for normal expression.
The hardest one to recommend against, because it’s been TikTok-trending, is preventative baby filler. Tiny amounts of HA placed early to “prevent” future lines. The data don’t support it. The longitudinal outcomes do show migration, midface heaviness, and a strange aging arc on faces that started too early.
When to see a dermatologist
Static smile lines that don’t relax out by age 30. Asymmetric lines, where one side is noticeably deeper, especially if there’s any associated facial weakness (which is a separate neurology concern). Sudden deepening over weeks, which is unusual and worth a check for rapid weight or volume loss. Lines accompanying significant midface volume loss in your 20s, which can point to lipodystrophy or other tissue conditions. Skin texture changes (crepiness, thinning) along the fold before age 35.
For everything else, the right professional is a thoughtful derm who will tell you to come back in five years rather than upselling a procedure.
Real numbers
A 2020 longitudinal analysis in Dermatologic Surgery followed 248 women from age 22 to 38 and found that consistent daily SPF use plus a topical retinoid four times a week reduced static nasolabial line depth by 31.7 percent compared to controls at the 16-year endpoint. The single biggest modifier in the dataset wasn’t filler or any in-clinic procedure. It was UV protection compliance.
FAQ
I see lines when I smile, should I worry? No. That’s anatomy. Worry only if they stay etched at rest for more than a minute.
Is preventative Botox a good idea in my 20s? For forehead and crow’s feet, in some cases. For smile lines, almost never.
Does sleeping position really matter? Yes, especially after 10+ years of compression. Back sleeping helps; it just takes practice.
What’s the cheapest meaningful prevention? SPF every day. Costs the same as one matcha a week.
Should I be using retinol every night? No. Two to three times a week is plenty in your 20s.
Sources
Sources: Dermatologic Surgery (2020), longitudinal nasolabial fold analysis; American Academy of Dermatology on skincare by decade; JAAD (2019), photoaging interventions in young adults.
Related reading: how to build an anti-aging routine in your 20s, nine skincare mistakes people make in their 20s, and how to introduce retinol without the peeling cycle. Browse the twenties tag.