Smokers Lines: Why You Get Them (Even If You've Never Smoked) and How to Smooth Them

You catch your reflection in a car window, apply lipstick, and notice it has bled into thin vertical lines above your upper lip. The first thing many women think is, “Wait — those are smokers lines. I’ve never smoked.” Welcome to one of the most misnamed features in dermatology.

Smokers lines — clinically called perioral rhytides or vertical lip lines — are mostly about your anatomy, your sun history, and a small muscle that has been pursing your lips a thousand times a day for forty years. Smoking accelerates them, but it doesn’t cause them on its own.

Why The Skin Above Your Upper Lip Wrinkles First

The skin around your mouth is among the thinnest on your face. A 2025 review of human lip aging found the perioral region carries less collagen and elastin per square millimeter than the cheeks, less subcutaneous fat than the forehead, and fewer oil glands than virtually anywhere else on the face [1]. Thin skin with little structural reinforcement is a wrinkle waiting to happen.

That thin skin sits directly on top of the orbicularis oris — the sphincter-like muscle that purses your lips when you sip a straw, kiss, whistle, drink from a coffee cup, or pronounce vowels like “oh” and “ooh.” Histological studies of the upper lip in younger versus older subjects show the orbicularis oris atrophies with age, with muscle bundles shrinking and the surrounding connective tissue layer thickening [2]. As the muscle thins, fibrous attachments between the muscle and the skin pull the dermis inward each time the lips purse, creating the radial pattern of vertical lines you see.

Repetition is the pattern. Sun damage is the catalyst.

The Sun Damage Problem

Look at the upper lip in photographs of identical twins where one had decades of unprotected sun exposure and the other didn’t. The smoker-line pattern looks dramatically different — and neither twin smoked.

The skin around your mouth is among the thinnest on your face.

Ultraviolet radiation triggers a cascade in skin cells that produces matrix metalloproteinases, particularly MMP-1, MMP-3, and MMP-9. These enzymes are essentially molecular scissors that snip apart collagen and elastin in the dermis [3]. UV exposure does this in two compounding ways: it stimulates collagen breakdown, and it inhibits new collagen production. Over decades, the dermal scaffolding that should hold your upper-lip skin smooth becomes fragmented and disorganized.

Add to this that the upper lip rarely gets sunscreen. Most women apply SPF to their cheeks and forehead but skip the area below the nose, and lip products usually wear off within an hour. The cumulative photodamage at this site is measurably higher than at adjacent facial zones.

Smoking does worsen the problem — the repetitive pursing of dragging on a cigarette mechanically deepens the lines, and the heat plus thousands of free radicals from smoke accelerate collagen breakdown. But you can develop classic smokers lines without ever touching a cigarette. Anyone who drinks through straws, plays a wind instrument, or simply lives in a sunny climate for fifty years is a candidate.

What Actually Smooths Them

The treatments that work fall into three categories: clinical procedures, topical regimens that rebuild the dermis, and prevention.

Clinical procedures — chiefly hyaluronic acid filler placed directly into the lines, fractional laser resurfacing, and small doses of botulinum toxin to relax the orbicularis oris — give the most visible immediate change. They are also expensive, temporary (3–12 months for filler, 3–4 months for toxin), and require a skilled injector. For deep, etched lines that already cross the vermilion border, these are usually the only option that produces dramatic improvement.

Topical retinoids are the only at-home treatment with strong evidence for actually rebuilding the collagen network in this area. The landmark trial published in the New England Journal of Medicine showed topical tretinoin produced an 80% increase in collagen I formation in photodamaged skin, compared with a 14% decrease in vehicle-treated controls [4]. Over-the-counter retinol delivers a similar — if slower — effect: a randomized trial of retinol on naturally aged skin found significant improvements in fine wrinkles and increased fibroblast collagen synthesis after 24 weeks [5]. A 2022 review of retinoid clinical evidence confirmed both prescription and over-the-counter forms reliably reduce perioral wrinkles when used consistently for at least 3–6 months [6].

If you are looking at faint vertical lines that show only when you purse your lips, you are at the prevention stage.

The catch with conventional retinol on perioral skin is irritation. The lip area is so thin and reactive that many women cannot tolerate the standard retinol-in-petrolatum formulations long enough to see results. They start, peel, panic, and quit at week three.

Why Delivery Matters More Than Concentration

This is where the conversation about retinol formulation becomes interesting. The active ingredient is the same molecule no matter the brand — it is the vehicle that determines whether the retinol reaches the dermal fibroblasts where it needs to act, or sits on the surface causing redness without penetration.

Conventional retinol uses petroleum-derived solvents to disrupt the skin barrier and force the molecule through. This is mechanistically destructive: a 2009 review on retinoid clinical efficacy explicitly notes that barrier compromise is the primary driver of retinoid intolerance [7]. On the upper lip, where the barrier is already thin, this often produces unacceptable irritation.

A more recent generation of retinol delivery systems uses lipid nanoparticle encapsulation — the same nanotechnology used in modern drug delivery — to ferry retinol through the epithelial barrier without damaging it. Nanoretinol was developed by a multidisciplinary team of PhD-level scientists over two years specifically to solve the irritation problem on thin, reactive skin. The nanoparticles are externally identical to skin cells, so the body recognizes them as “self” and allows passage without barrier disruption.

In North Biomedical’s clinical study, this delivery format produced 232% greater collagen recovery and 73% greater elastin recovery than conventional retinol, alongside drastically reduced cytotoxicity [8]. For perioral skin specifically — where collagen and elastin are the primary structural targets and irritation is the primary obstacle to compliance — that combination matters.

A Realistic Routine

If you are looking at faint vertical lines that show only when you purse your lips, you are at the prevention stage. Daily SPF on the upper lip, a topical retinol most nights, and a peptide moisturizer can keep them from deepening. See our guide on retinol for wrinkles for application details.

If the lines are visible at rest but shallow, a consistent retinol routine over six to twelve months will produce measurable improvement. Pair it with vitamin C in the morning and reapplication of SPF over your lipstick.

If the lines are deep and etched — visible from across the room with no facial movement — topical treatment alone will not fully erase them, but it will hold them in place and rebuild the surrounding dermis. Combining a tolerable retinol with a single session of fractional laser or microdroplet filler usually produces the best result.

The last thing to mention is what to skip. Aggressive lip exfoliation, alcohol-based perioral products, and “plumping” glosses that contain capsicum or peppermint all damage the barrier in an area that cannot afford it. The upper lip rewards patience and gentle persistence — not aggression.

What To Take Away

Smokers lines are an anatomy story, not a smoking story. The upper lip is uniquely thin, uniquely sun-exposed, and uniquely worked by a muscle that contracts hundreds of times a day. Time and UV erode the collagen scaffold underneath; muscle pull turns the loss into visible lines. Topical retinoids — particularly delivery systems that don’t require barrier disruption — are the only at-home treatment with strong evidence for rebuilding the dermis in this area. For more on lip-aging dynamics, see our pieces on lip lines and thinning lips.

References

1. Sun F, Liu Y, Zhang T. “Aging of the Human Lip: Current Knowledge and Clinical Implications.” Journal of Cosmetic Dermatology. 2025;24(8):e70310. doi:10.1111/jocd.70310
2. Penna V, Stark GB, Eisenhardt SU, Bannasch H, Iblher N. “The aging lip: a comparative histological analysis of age-related changes in the upper lip complex.” Plastic and Reconstructive Surgery. 2009;124(2):624-628. doi:10.1097/PRS.0b013e3181addc06
3. Quan T, Qin Z, Xia W, Shao Y, Voorhees JJ, Fisher GJ. “Matrix-degrading Metalloproteinases in Photoaging.” Journal of Investigative Dermatology Symposium Proceedings. 2009;14(1):20-24. doi:10.1038/jidsymp.2009.8
4. Griffiths CE, Russman AN, Majmudar G, Singer RS, Hamilton TA, Voorhees JJ. “Restoration of Collagen Formation in Photodamaged Human Skin by Tretinoin (Retinoic Acid).” New England Journal of Medicine. 1993;329(8):530-535. doi:10.1056/NEJM199308193290803
5. Kafi R, Kwak HSR, Schumacher WE, et al. “Improvement of naturally aged skin with vitamin A (retinol).” Archives of Dermatology. 2007;143(5):606-612. doi:10.1001/archderm.143.5.606
6. Milosheska D, Roškar R. “Use of Retinoids in Topical Antiaging Treatments: A Focused Review of Clinical Evidence for Conventional and Nanoformulations.” Advances in Therapy. 2022;39(12):5351-5375. doi:10.1007/s12325-022-02319-7
7. Mukherjee S, Date A, Patravale V, Korting HC, Roeder A, Weindl G. “Retinoids in the treatment of skin aging: an overview of clinical efficacy and safety.” Clinical Interventions in Aging. 2006;1(4):327-348. doi:10.2147/ciia.2006.1.4.327
8. North Biomedical LLC. “Nanoretinol vs. Conventional Retinol: Efficacy in Collagen and Elastin Recovery.” Clinical Study Summary, 2024. https://northbiomedical.com/documents/Nanoretinol-Study_Summary.pdf