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Face with Nasolabial Folds

Nasolabial Fold Filler: How It Works and What to Expect

Nasolabial folds, also known as nasolabial lines or smile lines, are the creases that run from the sides of the nose to the corners of the mouth. They are a natural part of facial anatomy, but with age and changes in collagen and elastin, these folds can deepen, sometimes progressing into moderate-to-severe nasolabial folds or moderate-to-severe nasolabial wrinkles. For many patients, this creates a heavy or tired appearance that does not reflect how they feel.

 

At PHI Clinic, nasolabial fold dermal fillers are one of the most effective non-surgical options to refresh the midface. Using premium hyaluronic acid-based dermal fillers, our practitioners restore support, soften creases, and blend the transition between the cheek and mouth.

woman smiling with nasolabial folds

Why nasolabial lines become more noticeable

Several factors contribute to the development of nasolabial lines. As collagen levels fall, the skin becomes thinner and less able to bounce back. Natural cheek fat pads descend with age, adding weight that accentuates the fold. Genetics, sun exposure, smoking, and lifestyle are also major influences.

 

Understanding whether your folds are due to volume loss, skin changes, or structural anatomy is essential before deciding on nasolabial filler.

How dermal fillers help

Nasolabial filler treatment involves carefully placing a hyaluronic acid filler injection beneath the skin to restore support. Hyaluronic acid gel attracts and binds water, giving hydration and structure to skin that has lost elasticity.

 

Unlike surgery, filler provides a subtle lift. At PHI Clinic, our goal is not overcorrection, but gentle refinement with hyaluronic acid that reduces fold depth, creating a refreshed yet natural smile. This balance preserves facial expression while offering the benefits of facial rejuvenation.

woman with naturally soft looking skin

Treatment in practice


During the treatment, small amounts of hyaluronic acid injectable gel are delivered with fine needles or cannulas. 


Some patients benefit from a combined approach, for instance, cheek filler can restore midface support, reducing pressure on the fold. Others may be candidates for poly-L-lactic acid, which stimulates collagen production for longer-lasting results compared with fat vs hyaluronic acid options.


The treatment typically takes around 30 minutes. Recovery is minimal, though mild swelling or bruising may appear. Results are immediate, with the final outcome settling naturally after a few days.

What results usually look like

 

Patients often describe their outcome as looking “less tired” or “more refreshed.” Nasolabial filler creates a smoother transition between the cheek and mouth, while folds appear reduced in depth but not completely erased.

 

Results last nine to twelve months. Longevity depends on metabolism, formulations of hyaluronic acid, lifestyle, and the natural movement of the area. 

 

Some studies highlight the efficacy of hyaluronic acid and the effectiveness in treating moderate-to-severe nasolabial folds, with large-gel particle hyaluronic acid or proprietary hyaluronic acid formulations lasting longer.

Factors that influence longevity

The safety of hyaluronic acid in smile line correction depend on several key variables:

 

  • Type of filler: Softer products are suited for fine creases, while hyaluronic acid soft-tissue filler use with denser gels provides lift.
  • Skin health: Patients with hydrated, well-cared-for skin tend to hold results better.
  • Lifestyle: Smoking and sun exposure accelerate filler breakdown.
  • Facial movement: Because nasolabial lines are highly expressive areas, results may fade sooner than in less active regions.

 

At PHI Clinic, our team follow guidelines for hyaluronic filler selection, ensuring treatment aligns with both your skin needs and your aesthetic goals.

Who is suitable for treatment?

Nasolabial fold dermal fillers are often the right solution for patients with folds caused by midface descent or volume loss. They are especially effective for moderate-to-severe wrinkles.

 

However, for patients with pigmentation, fine skin, or more significant laxity, complementary options such as skin boosters or skin-tightening technologies may be advised. Suitability is always confirmed during a detailed consultation, where we may also discuss advanced options such as poly-L-lactic acid alongside augmentation with hyaluronic fillers.

Woman concerns with nasolabial folds

The importance of precision and safety

The nasolabial fold region is complex, lying close to key blood vessels. Poor placement or overfilling can result in complications or an unnatural look. Complications of hyaluronic fillers, though rare, highlight the importance of experienced care.

At PHI Clinic, all nasolabial filler treatments are carried out by doctors trained in advanced techniques. We only use quality products, such as Juvederm, ensuring comfort, refinement, and safety.

 

Your treatment journey ahead

 

Because fillers fade gradually, patients usually return for review at around 12 months. Some choose smaller top-ups to maintain results, while others wait until the filler has completely metabolised. The flexibility of hyaluronic acid derivatives means your plan can evolve with your needs.

Rediscover confidence with bespoke facial rejuvenation

If you are concerned about deepening nasolabial folds or smile lines, nasolabial fold filler may provide the ideal solution. At PHI Clinic, your treatment is always bespoke, designed to achieve a refined, youthful appearance while maintaining harmony with your natural features.

 

Book your consultation today at PHI Clinic, Harley Street, and take the first step towards a smoother, balanced look with expert-led care.

phi clinic london harley street

Location
 

PHI Clinic
102 Harley Street,
London,
W1G 7JB,
United Kingdom

Tel: 02070345999

Opening Hours
 

Monday & Tuesday - 9:30am to 6:00pm
Wednesday & Thursday - 9:30am to 8:00pm
Friday - 9:30am to 5:00pm
Saturday - 11:30am to 12:30pm
Sunday - Closed
 

Opening times can change, if your appointment is outside of these times please contact the clinic for confirmation.