Is Nasolabial Fold Filler Safe?

Yes — nasolabial fold filler is safe when performed by a qualified, anatomy-trained medical professional using a regulated hyaluronic acid product. It is one of the most studied areas in facial aesthetics, with a well-characterised side effect profile and a strong evidence base built over decades of clinical use.

That said, safe does not mean risk-free. Like all injectable treatments, the safety of nasolabial filler is directly tied to who performs it, what product they use, and how carefully a patient has been assessed beforehand.

This article covers what the evidence shows, what the risks actually are, and how to choose a practitioner you can trust.

Nasolabial folds are the lines that run from the sides of the nose down to the corners of the mouth. They deepen with age as the mid-face loses volume and structural support, allowing the skin to descend and fold. Dermal filler — almost always hyaluronic acid — is injected into or alongside the fold to restore that lost volume and soften its depth.

Hyaluronic acid is a substance the body produces naturally. It is found throughout the skin, connective tissue, and joints, where it attracts water and maintains volume and elasticity. In filler form it is cross-linked to slow its natural breakdown, extending how long the result lasts. Because it is a naturally occurring molecule, it is well tolerated by the body — and crucially, it is fully reversible with an enzyme called hyaluronidase, should that ever be needed.

Nasolabial filler is one of the most researched applications in aesthetic medicine. The evidence base is extensive and consistent: it is effective, well-tolerated, and carries a low rate of serious adverse events when properly administered. Click each study below to read the key findings.

1. Adverse Events Reported From Hyaluronic Acid Dermal Filler Injections to the Facial Region: A Systematic Review and Meta-Analysis (by the National Library of Medicine)

The nasolabial fold region experienced fewer adverse events — including swelling, lumpiness, and firmness — than the midface, perioral lines, or lips.

Nasolabial filler is one of the most researched applications in aesthetic medicine. The evidence base is extensive and consistent: it is effective, well-tolerated, and carries a low rate of serious adverse events when properly administered. Click each study below to read the key findings.

Read the full study here →

2. Safety and Efficacy Assessment of a Cross-linked Hyaluronic Acid Dermal Filler for Correction of Moderate-to-Severe Nasolabial Folds in Skin Types III and IV (by Dermatologic Therapy)

Adverse events were mild and transient across all 30 participants. Patient satisfaction scores ranged from 9 to 10 out of 10 at every follow-up point.

This prospective clinical study assessed hyaluronic acid filler for nasolabial fold correction across 30 patients, with follow-up assessments at 2, 12, and 24 weeks. Meaningful fold improvement was recorded at all three time points. No serious adverse events occurred during the full study period, and the filler demonstrated a high safety profile across a range of skin types.

Read the full study here →

3. Efficacy of a New Hyaluronic Acid Dermal Filler on Nasolabial Folds Correction (by PMC)

Significant fold improvement was maintained across the 9-month follow-up period. No serious adverse events were reported. Local tolerance was rated as favourable.

In this randomised, investigator and subject-blinded trial, 45 participants with moderate-to-severe nasolabial folds were treated and followed for 9 months. The study assessed both efficacy and local tolerance at multiple time points. The results confirmed sustained improvement with a favourable safety profile, reinforcing the established clinical consensus on HA filler in this area.

Read the full study here →

Taken together, this body of research supports nasolabial filler as a safe, effective treatment with a well-understood risk profile — not a claim that complications never occur, but that they are manageable, largely preventable, and predominantly mild when treatment is performed correctly.

Understanding the full picture means separating what is normal and expected from what is genuinely uncommon or rare. The table below sets this out clearly.

A note on vascular occlusion

This is the most serious risk associated with any facial filler and warrants a clear explanation. The facial artery runs close to the nasolabial treatment site. If filler is accidentally injected into or compresses a blood vessel, it can restrict blood flow to surrounding tissue. The warning signs are skin that turns pale or mottled, and pain that increases rather than improving.

Treated promptly with hyaluronidase, the risk of lasting damage is significantly reduced. This is why every competent filler practitioner must have hyaluronidase available during treatment — and why the experience and anatomical knowledge of your practitioner matter more than any other variable.

For a full breakdown of what to expect during recovery and what to watch for in the days after treatment, read our nasolabial filler recovery and aftercare guide.

Not all filler treatments carry the same risk profile. The lips, for example, swell significantly and the tissue is thin and unforgiving. The under-eyes require exceptional precision. The nasolabial fold is, by comparison, one of the more predictable areas to treat.

The tissue is of moderate thickness, which allows for accurate placement at the correct depth. Swelling here is typically mild — notably less than the lips or midface. And as the systematic review cited above confirms, the nasolabial fold records fewer adverse events across the board than most other facial treatment sites.

None of this means the area can be treated carelessly. The facial artery demands respect, and the anatomy must be understood properly. But for a well-trained medical practitioner, the nasolabial fold has an established and manageable safety profile.

Yes. Hyaluronic acid filler can be fully dissolved with hyaluronidase — an enzyme that breaks it down rapidly. This is one of the most important safety features of HA-based products and a key reason hyaluronic acid remains the gold standard for facial filler.

Reversal is used both in emergency situations and electively, when a patient is unhappy with the result or wants to change their approach. The process takes effect within minutes to hours and does not permanently alter the tissue.

Nasolabial filler is not appropriate for everyone. Treatment is not recommended for patients who:

• Are pregnant or breastfeeding
• Have an active skin infection or inflammation in or near the treatment area
• Have a known allergy to hyaluronic acid or any filler component
• Have autoimmune conditions that may affect healing or increase inflammatory risk
• Are taking anticoagulant medications or have clotting disorders (unless cleared by a physician)
• Have significant skin laxity in the mid-face — in these cases, addressing underlying volume loss or skin quality may produce a better result than treating the fold directly

Choosing the right practitioner is the most consequential safety decision you will make. Before proceeding anywhere, these are the questions worth asking.

• What are your medical qualifications and GMC registration number?
• Are you trained in managing vascular complications?
• Do you have hyaluronidase available during the treatment itself?
• What product are you using and is it CE-marked?
• What is your process if I experience a complication after I leave?

A reputable clinic will answer every one of these without hesitation. Vague or defensive responses are meaningful information.

At Dr Hass Clinic, nasolabial filler is performed exclusively by Dr Hasaneen Al-Janabi — a GMC-registered surgeon with a background in surgical anatomy and extensive experience in facial filler treatment. Hyaluronidase is always available during treatment. Every patient receives direct aftercare contact details so that any post-treatment concern can be raised promptly.

Dr Hasaneen takes a considered approach to the nasolabial area in particular. In many patients, deepening folds are driven by mid-face volume loss rather than the fold itself. Treating the fold in isolation without addressing that underlying structural change can produce a result that looks heavy or artificial. Where this is the case, he will tell you — and discuss what would actually serve your face better.

Considering nasolabial filler?

Book a consultation at Dr Hass Clinic for an honest assessment from a GMC-registered surgeon. If nasolabial filler is right for you, we will give you a clear picture of what to expect. If something else would serve you better, we will tell you that too.