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Home > Skin & Beauty > Skin Conditions > What Causes Smile Lines and How to Get Rid of Them

What Causes Smile Lines and How to Get Rid of Them

July 12, 2021 - Updated on August 31, 2021
6 min read
By Akanksha Shah Sanghvi, MD, Clinical Dermatology

In this article:

  • Causes of Smile Lines
  • Treatment for Smile Lines
  • When to See a Doctor
  • Final Word

Lines and wrinkles on the face are a part of skin aging, an inevitable process. Among these signs of aging, the first to appear are smile lines, also known as nasolabial folds.

smile lines

Smile lines refer to the folds that form from both sides of the nose to the corners of the mouth. You may also notice wrinkles on the corner of your eyes and on your nose while smiling.

These lines are initially visible only when you smile, but with years of laughing and smiling, they may deepen and become permanent. There are treatments you can take to fade these smile lines and give your skin a younger appearance.

Causes of Smile Lines

what causes smile lines?

Several factors contribute to the appearance of smile lines. The common ones are:

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  • Low collagen and elastin reserves: As you get older, your skin gradually loses its ability to produce collagen and elastin fibers. This lack of structural proteins makes the skin loose, leading to the development of folds and lines.
  • Skin dehydration: Another skin aging factor that contributes to the formation of fine lines and wrinkles is decreased production of natural moisturizing factors (NMF), which affects the skin’s ability to pull moisture from the air, therefore increasing the chances of skin dehydration. Dry skin can shrink and develop smile lines.
  • Repetitive facial expressions: Frequent repetitive facial expressions cause the muscles to contract and relax, resulting in the formation of smile lines and wrinkles over time.
  • Heredity: You may be predisposed to the formation of smile lines at an early age due to genetic factors.
  • Smoking: The smoke from cigarettes can affect your skin health and can induce collagen breakdown in the skin. Furthermore, nicotine can impede blood flow to the skin surface, increasing the chances of developing smile lines.
  • Sun exposure: The harmful ultraviolet rays of the sun can damage the skin by increasing oxidative stress and therefore contribute to smile lines and wrinkles.
  • Improper sleeping positions: While you sleep, your skin may fold and remain so the entire night. This external pressure forms creases on the skin, resulting in facial wrinkles. Such formation of fine lines due to external changes to the skin is commonly seen in people who sleep on their sides or on the stomach.

Treatment for Smile Lines

Smile lines are not a medical concern, but they can be a cosmetic problem for many people. The good news is several treatments are available to help fade these lines.

Treatments

treatments available to counter smile lines

Different treatment modalities, when performed by experts, can help improve smile lines. Your doctor will analyze the depth of your smile lines and your skin condition and will suggest a suitable treatment, such as the following.

  • Thread lift: Temporary sutures are done to lift and retighten the skin, smoothing out wrinkles and giving your skin a younger appearance. (1)
  • Dermal fillers: Injectable gels are given to plump up your skin, leveling out smile lines when injected in the nasolabial area. (2)
  • Botulinum toxin: Also known as Botox Ò, this is a temporary solution to minimize muscle contraction and therefore prevent the formation of smile lines. (3)
  • Mesotherapy: A cocktail of nourishing compounds, including vitamins A, B, C, E, and K, hyaluronic acid, coenzymes, and minerals, are injected into the middle layer of the skin to rejuvenate it. (4)
  • PRP (platelet-rich plasma): Also known as a vampire facelift, this procedure uses growth and healing factors from your own blood to boost skin turnover. The doctor will extract beneficial plasma from your blood and inject it into skin that is pretreated with filler injections to help increase skin cell production, therefore aiding in skin rejuvenation. (5)
  • High-intensity focused ultrasound (HIFU): This non-invasive procedure uses HIFU energy to stimulate collagen production deep within the skin, reaching up to the subcutaneous layer, to help improve smile lines and wrinkles. (6)
  • Radiofrequency (RF): Radiofrequency waves are used to tighten the skin and treat photoaging. (7)
  • Laser treatment: Lasers help exfoliate the outer damaged skin layer, therefore encouraging the production of new skin cells. The procedure also boosts collagen production. Note that laser treatment can cause swelling and microscabbing until the skin heals completely. (8)

Over-the-counter products

otc creams and serums can help reduce fine lines

Many over-the-counter creams and serums can help reduce smile lines and even delay the formation of new fine lines. These include:

  • Moisturizers: The regular use of moisturizers goes a long way in keeping your skin healthy and plump, reducing the appearance of smile lines.
  • Retinols: A derivative of vitamin A, retinol is an antioxidant that not only helps fade existing smile lines but also helps delay the formation of new fine lines. The topical application of retinol can therefore combat wrinkles due to natural aging. (9)
  • Alpha hydroxy acids: These are mild skin exfoliants that boost collagen synthesis, hydrate the skin, and make it firm. Therefore, the use of alpha hydroxy acids can aid in the reduction of smile lines and wrinkles. (10)
  • Vitamin C: Vitamin C stimulates collagen production, therefore helping thicken the skin layers. This, in turn, makes the skin firm and taut, smoothing out smile lines.
  • Peptide serums: Protein-based serums can help improve skin elasticity and firmness, therefore aiding in the management of smile lines and wrinkles.

When to See a Doctor

when to consult a doctor regarding smile lines?

You can consult your doctor for the treatment of smile lines or wrinkles if they are bothersome for you. The doctor will analyze your skin condition and prescribe the appropriate treatment.

Also, make sure to comply with your scheduled checkups after the medical treatment so your doctor can track your recovery. Get immediate medical attention if you experience vision problems, pain, or signs of stroke after getting the treatment.

What you may ask your doctor
  • Is excessive smiling the cause of smile lines?
  • What can I do to prevent these smile lines from becoming permanent?
  • What treatment do you suggest for my smile lines?
  • Can I combine botulinum toxin treatment with other treatments for better results?
What your doctor may ask you
  • When did the smile lines first appear?
  • Do you smoke?
  • Are you under a lot of stress?
  • Have you undergone any skin treatment?

Final Word

Smile lines are a type of wrinkles that appear on your face and deepen with age. While there is nothing you can do to prevent smile lines from forming, you can take steps to delay their appearance.

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You can seek different treatments to fade or smoothen out smile lines. Different noninvasive treatment modalities provide short-term or long-term solutions to wrinkles and fine lines. Consult your doctor on a suitable treatment and how to maintain young-looking skin.

Continue Reading Continue ReadingSmile Lines: Ways to Prevent and Reduce at Home
References
  1. A; AAKDG. Thread Lifts: A Critical Analysis of Treatment Modalities. Journal of drugs in dermatology: JDD. https://pubmed.ncbi.nlm.nih.gov/32272519/.
  2. Funt D, Pavicic T. Dermal fillers in aesthetics: an overview of adverse events and treatment approaches. Clinical, cosmetic and investigational dermatology. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3865975/. Published December 12, 2013.
  3. Kattimani V, Tiwari RVC, Gufran K, Wasan B, Shilpa PH, Khader AA. Botulinum Toxin Application in Facial Esthetics and Recent Treatment Indications (2013-2018). Journal of International Society of Preventive & Community Dentistry. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6489509/. Published 2019.
  4. Sivagnanam G. Mesotherapy – The french connection. Journal of pharmacology & pharmacotherapeutics. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3142757/. Published January 2010.
  5. Yuksel EP; Sahin G; Aydin F; Senturk N; Turanli AY; Evaluation of effects of platelet-rich plasma on human facial skin. Journal of cosmetic and laser therapy: official publication of the European Society for Laser Dermatology. https://pubmed.ncbi.nlm.nih.gov/25065381/.
  6. Park H; Kim E; Kim J; Ro Y; Ko J; High-Intensity Focused Ultrasound for the Treatment of Wrinkles and Skin Laxity in Seven Different Facial Areas. Annals of dermatology. https://pubmed.ncbi.nlm.nih.gov/26719637/.
  7. el-Domyati M, el-Ammawi TS, Medhat W, et al. Radiofrequency facial rejuvenation: evidence-based effect. Journal of the American Academy of Dermatology. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6541915/. Published March 2011.
  8. Verma N. Ablative Laser Resurfacing. StatPearls [Internet]. https://www.ncbi.nlm.nih.gov/books/NBK557474/. Published August 13, 2020.
  9. Kafi R; Kwak HS; Schumacher WE; Cho S; Hanft VN; Hamilton TA; King AL; Neal JD; Varani J; Fisher GJ; Voorhees JJ; Kang S; Improvement of naturally aged skin with vitamin A (retinol). Archives of dermatology. https://pubmed.ncbi.nlm.nih.gov/17515510/.
  10. Moghimipour E. Hydroxy Acids, the Most Widely Used Anti-aging Agents. Jundishapur journal of natural pharmaceutical products. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3941867/. Published 2012.
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