Wrinkle Relaxer vs. Dermal Filler: How to Know Which One You Actually Need

“Should I get Botox or filler?” is one of the most common questions we hear during consultations at Blanqa Medspa in Henderson — and it's a great question, because the honest answer is: it depends on what's actually causing the line or hollow you're looking at. Wrinkle relaxers and dermal fillers are often lumped together as “the same kind of thing,” but they work through completely different mechanisms, treat different problems, and last for different lengths of time. Picking the wrong one doesn't just waste money — it can mean walking away without the improvement you were hoping for.

Here's how to actually tell them apart, what the research says about each, and how we help patients decide which one (or both) makes sense.

The Core Difference: Dynamic vs. Static Wrinkles

The simplest way to understand the difference is to ask: is the line caused by movement, or by lost volume?

• Wrinkle relaxers (botulinum toxin type A) temporarily relax the muscles that create expression lines. They address dynamic wrinkles — the ones that appear when you move your face, like frown lines, forehead lines, and crow's feet.
• Dermal fillers (typically hyaluronic acid) add volume and structural support. They address static concerns — hollows, folds, and volume loss that are visible even when your face is at rest, like nasolabial folds, thinning lips, or flattened cheeks.

Neither treatment does the other's job well. Injecting filler into a purely movement-based line won't stop the muscle from creating it again, and using a wrinkle relaxer on a hollow cheek won't restore lost volume. Getting this distinction right is the single biggest factor in whether a treatment plan actually delivers the result you wanted.

What the Research Shows

• A 2013 meta-analysis in Dermatologic Surgery, pooling four Phase III trials and 621 patients, found onabotulinumtoxinA produced a pooled median duration of effect of roughly 120 days (about four months) for glabellar lines, with 84.2% of patients classified as responders at day 30.
• A 2025 systematic review in Aesthetic Plastic Surgery, covering 24 studies and 1,410 patients, found hyaluronic acid filler persistence of roughly 60–86% at 12 months and 50–86% at 24 months depending on the measurement method and product used — meaningfully longer than wrinkle relaxers, though duration varies widely by brand, technique, and treatment area. Long-term complications were uncommon (under 5% of cases).
• A randomized controlled trial in Aesthetic Plastic Surgery compared botulinum toxin alone to a combination of botulinum toxin plus hyaluronic acid filler for glabellar frown lines in 40 patients. The combination group showed significantly better wrinkle scores at rest and at maximum frown by weeks 20 and 28, along with higher patient satisfaction — suggesting that for some areas, combining both treatments outperforms either one alone.
• The American Academy of Dermatology notes that results from both treatment categories vary by individual anatomy, dose, and technique — reinforcing that neither is a guaranteed, one-size-fits-all fix, and that a proper assessment matters more than defaulting to whichever treatment is trending.

Which One Do You Actually Need?

A quick way to map common concerns to the right starting point:

• Forehead lines, frown lines (the “11s”), crow's feet — usually wrinkle relaxer, since these are driven by repeated muscle movement.
• Nasolabial folds, marionette lines, thinning lips — usually dermal filler, since these involve volume loss or structural support.
• Hollow or flattened cheeks, under-eye hollowing — dermal filler, to restore lost volume.
• Lines that persist even when your face is relaxed — often a combination, since long-standing dynamic wrinkles can eventually etch into the skin at rest.
• Early prevention for expression lines — wrinkle relaxer, though the evidence on how much this delays future static wrinkles is still developing, and we'll be upfront about that rather than overselling it.

How Long Does Each One Last?

• Wrinkle relaxers typically last about 3 to 4 months, based on the clinical trial data above, with full effect visible around two weeks after treatment.
• Dermal fillers typically last considerably longer — commonly 6 to 18 months or more depending on the specific product, the area treated, and your individual metabolism, with some areas showing measurable volume even at 24 months in the research above.
• Both treatments are temporary by design, which is part of why they're considered lower-risk than surgical options — nothing is permanent, so there's room to adjust your plan over time.

When Combining Both Makes Sense

For patients with concerns in both categories — say, dynamic forehead lines and volume loss in the cheeks — combining wrinkle relaxer and filler in the same overall plan (though not necessarily the same visit) is common and, per the research above, can outperform either treatment alone in areas where both dynamic movement and static folds are contributing to the same line. This is exactly the kind of nuance that's hard to self-diagnose from a photo or a trend online, which is why we build every plan around an in-person assessment.

What to Expect at Your Blanqa Consultation

• We assess at rest and in motion — looking at your face both relaxed and animated to determine whether a line is dynamic, static, or both.
• We map your goals to the right category first, rather than starting with a specific product or treatment you may have seen advertised.
• If both are appropriate, we'll discuss sequencing and timing rather than doing everything in a single visit.
• You leave with a plan, including expected duration and a realistic sense of what to expect at your follow-up.

The Takeaway

The “Botox or filler” question isn't really an either-or — it's a “which problem am I actually trying to solve” question, and the two treatments work best when matched to the wrinkle type that's actually causing your concern. If you're in Henderson, Las Vegas, or the surrounding valley and aren't sure which category your lines fall into, that's exactly what a consultation is for.

Ready to talk it through? Book a consultation with our team at Blanqa Medspa and we'll help you figure out exactly what your skin needs — not just what's trending.

About the Author

Bianca Camille Fong, APRN, FNP-BC is a board-certified Family Nurse Practitioner and the Founder & CEO of both Blanqa Medspa and Fong Precision Care in Henderson, NV. She combines a clinical primary-care background with advanced aesthetic training to deliver evidence-based, safety-first treatment plans for every patient who walks through Blanqa's doors.

Sources

• Kane MA, Brandt F, Rohrich RJ, et al. OnabotulinumtoxinA: A Meta-Analysis of Duration of Effect in the Treatment of Glabellar Lines. Dermatologic Surgery. 2013. pubmed.ncbi.nlm.nih.gov/23106853
• Clinical Durability of Hyaluronic Acid-Based Dermal Fillers for Facial Application: A Systematic Review. Aesthetic Plastic Surgery. 2025. link.springer.com/article/10.1007/s00266-025-05435-1
• Comparison of Effectiveness and Safety of a Botulinum Toxin Monotherapy and a Combination Therapy with Hyaluronic Acid Filler for Improving Glabellar Frown. Aesthetic Plastic Surgery. 2022. link.springer.com/article/10.1007/s00266-022-02895-7
• American Academy of Dermatology Association. Botulinum Toxin Therapy: Overview. aad.org/public/cosmetic/wrinkles/botulinum-toxin-overview