"I had this HA five or six years ago. I was told it would absorb in six to twelve months. How can I still feel a ridge now?"
It's a common opening in nose revision clinic. A lot of people's mental image of hyaluronic acid (HA) stops at "it absorbs on its own and is gone after a while." So when that firm ridge on the bridge is still there years later, the first reaction is confusion, even doubting their own memory.
But recent imaging evidence points the other way: HA stays on the face far longer than assumed.
"HA absorbs in six to twelve months" isn't that accurate
HA is metabolised by the body, that's true. But the version where it's "completely gone in six to twelve months" is closer to marketing than to clinical reality.
A 2024 review in PRS Global Open by Master and colleagues is worth knowing. They followed 33 patients with mid-face HA on MRI, and the result was this: every single one still showed an HA signal on MRI, none had completely resolved two years after injection, and one patient was more than fifteen years out from their last injection with residue still visible on imaging. The study directly challenges the conventional claim that HA "only lasts three to twelve months."
In other words, the ridge you're feeling may well still be there, and you're not misremembering.
Key insight: HA is metabolised, but "completely absorbed in a few months" often doesn't hold. Imaging evidence shows it can persist in tissue for years.
Nose filler after 1, 2 and 5+ years: what's usually still there
The "6–12 months" on the label is an estimate of how long the visible effect lasts, not how long the gel stays in tissue. No large study has followed nose HA year by year on imaging, but the research that does exist lines up with the three questions people ask most.
Around 1 year. In a multicentre study of 28 women who had a single nose filler session, the change in nasal profile could still be measured at 48 weeks. At the same time, a long-term MRI case found HA almost completely broken down in the chin by 19 months, while it remained in the side of the face and the deep mid-face fat. So at one year, "still there" and "nearly gone" are both possible; it depends on the area and the depth it was placed at.
Around 2 years. In the MRI review of 33 patients with mid-face HA, every patient still showed filler, and none had fully cleared two years after injection. A 2026 systematic review (24 studies, 1,410 patients) found ultrasound studies reporting persistence of 12 to 36 months. If you can still feel a ridge at two years, it is very likely the original gel.
5 years and beyond. In the same MRI review, 12 patients had gone more than five years without an injection, some 8 to 15 years, and filler was still visible. A literature review of nonsurgical rhinoplasty found the longest reported duration was 8 years. And in a 2025 report of three patients, the nasal bridge slowly widened years after a single HA injection, with ultrasound confirming the HA was still there.
Whichever stage you're at, the next step is the same: if you can feel it, ultrasound can show what's there.
Why nose HA lingers in particular
No imaging study has shown that HA lasts longer in the nose than elsewhere on the face. What is clearer is why residue on the nose is so easy to notice. The reasons below are clinical reasoning, not measured findings.
The nose has a small subcutaneous space, so even a little residue is easy to feel; its relatively low blood flow may also slow breakdown, though that hasn't been measured. On top of that, HA on the bridge is often injected as a bolus, and the body wraps a fibrous capsule (encapsulation) around it, so material inside the capsule is even harder to clear. Many people, wanting "a bit more projection," top up repeatedly, new layered over old, and that ridge on the bridge just stays.
A 2023 case report illustrates this neatly: a patient who'd had HA in the nasal radix (the top of the bridge) developed a 15mm nodule there ten months later, briefly suspected of being a tumour. High-frequency ultrasound showed it was a capsule-wrapped HA pseudocyst, ultimately aspirated under ultrasound guidance and resolved within a week. Still there at ten months, still clearly visible, says a lot about how reluctant nose HA can be to disappear.
This is also why "it's worn off, so top it up" deserves a second look. The authors of the 33-patient MRI review say their findings suggest refill protocols need rethinking. Before adding more, it's worth confirming how much of the old filler is still there; layering new over old is one possible route to a bridge that widens with every top-up.
"Absorbed" or "actually still there"?
← Swipe to see more →
| What you're told | What's commonly the case |
|---|---|
| Absorbs in six to twelve months | Imaging shows it can persist for years (mid-face MRI: up to 15 years) |
| If you can't see it, it's gone | Invisible on the surface, still detectable on ultrasound / MRI |
| Another round of hyaluronidase dissolves it all | An encapsulated bolus often won't fully dissolve; repeated dissolving has a cost |
| A lump must mean something new grew | Usually it's that old bolus still there, not new tissue |
For which fillers can be dissolved and which can only be removed, see the nose filler decision matrix. If you've already had several rounds of hyaluronidase and it's still there, keep the cumulative cost of repeated dissolving in mind.
Can filler that's been there for years cause problems later?
Most residue stays quiet. But the literature describes a few late problems that appeared years after injection:
- Late swelling. In three periocular cases, HA placed up to 9 years earlier moved toward the surface and caused swelling; all improved after biopsy and hyaluronidase.
- Infection around old filler. A case report describes facial cellulitis 2.5 years after HA injection; MRI confirmed residual filler, and the authors suggested it may act as a reservoir for bacteria.
- A bridge that slowly widens, covered in the next section.
These are case reports with no rates attached, so they show what can happen, not how often. If an area with old filler suddenly becomes swollen, red or painful, see a doctor promptly. For late lumps on the nose, see delayed nose filler lumps and granulomas.
You can feel it, so what's next
The first step isn't to rush to conclude "is there still some" or to top up or dissolve again. It's to see it clearly.
Many "still feeling it years later" cases have never actually had an imaging assessment. High-frequency ultrasound can show which skin layer the residue sits in, how big it is, what material its echo pattern suggests, and its relationship to the nasal vessels. On how ultrasound confirms residue when "I feel it but I'm told it's nothing," see how ultrasound confirms retained nose filler.
Once confirmed, the direction is clear. Early, small-volume HA that hasn't encapsulated can be assessed for hyaluronidase (the enzyme that breaks down HA, used only after an in-person physician assessment); HA that has encapsulated, persists despite repeated dissolving, or has widened the bridge is usually more directly handled by physical removal under ultrasound guidance. A bridge that slowly widens and blunts years later, the so-called "avatar nose", can also be old HA that never left. In a 2025 report of three patients, each had a single HA injection, the bridge broadened years afterwards, and ultrasound confirmed residual HA; ultrasound-guided hyaluronidase then clearly improved the contour. This fits the general rule above: when the material is located precisely and hasn't encapsulated, hyaluronidase can still be considered. The full picture of displaced nose filler is in filler displacement and a distorted nose shape.
To be honest about it: HA can be dissolved in theory, but "how cleanly it dissolves" once encapsulated is another matter; removal doesn't come with a "guaranteed 100%" claim either. How much can be removed varies with material, time and degree of adhesion: the first session usually removes about 30–50%; with most fillers, two to three sessions can reach about 80–90%. It is not 100%, and it varies from person to person. The whole procedure uses local anaesthesia plus gentle pain-relief anaesthesia.
Key insight: When you can feel it on your nose years later, the point isn't "why is it still there," it's to see clearly where it is and what it is first, then decide whether to dissolve or remove.
FAQ
Q: Doesn't HA absorb on its own? A: It's metabolised, but that doesn't equal "gone in a few months." Imaging studies show HA can persist in tissue for years, and nose HA has been found on ultrasound years after a single injection. If you can feel it, it's usually still there.
Q: It's been over five years. Can it still be dealt with? A: Yes. Residue doesn't disappear with time; as long as ultrasound can locate it, removal can be assessed. The length of time isn't the deciding factor; precise localisation and clean, even removal are.
Q: So I just dissolve it again with another round of hyaluronidase? A: Early, non-encapsulated HA has a chance. But HA on the bridge is often wrapped in a fibrous capsule, where the enzyme can't reach the material inside, so repeated rounds often won't fully dissolve it, and ultrasound-guided removal is more direct.
Q: Could what I'm feeling be something else that grew? A: Possibly, but usually it's that old bolus still there. To tell residue from granuloma, biofilm or scar, ultrasound is the most reliable, so there's no need to frighten yourself.
Q: Is nose filler still there after 2 years? A: Often, yes. In an MRI review of 33 patients with mid-face HA, all still showed filler two years or more after their last injection. There's no study of the same size on the nose, but cases of nose HA confirmed on ultrasound years after a single injection have been reported. If you can feel it, ultrasound can confirm it.
Q: What happens to nose filler after 5 years? A: Some of it may have broken down; some may still sit where it was placed, or have spread sideways and widened the bridge. MRI has shown facial HA 15 years after injection. The number of years doesn't decide whether it can be dealt with; locating it precisely does.
Q: My old nose filler is still there. Should I top it up? A: Confirm how much is left and which layer it sits in first. Layering new filler over old may be one reason the bridge widens over time, and the authors of the 33-patient MRI review suggest refill schedules need rethinking. Whether to add, and how much, is decided after an in-person assessment.
In closing
"It absorbed long ago" is a fixed impression many people hold about HA, but the ridge you can feel on your nose often contradicts it. HA can last longer than assumed, and on the nose even a little of it is easy to feel.
Rather than going round in circles over "why is it still there," see it clearly first, which layer, how big, what it is. You're welcome to use an online personalised assessment or book a consultation, where Dr. Ta-Ju Liu can help confirm with ultrasound whether there's still HA residue in your nose, and the most suitable way to handle it. For the complete picture of how retained nose filler and lumps are repaired, start with the retained nose filler and lumps overview.
References
- Master M, Azizeddin A, Master V. Hyaluronic Acid Filler Longevity in the Mid-face: A Review of 33 Magnetic Resonance Imaging Studies. Plast Reconstr Surg Glob Open. 2024;12(7):e5934. PMID: 39015357. DOI: 10.1097/GOX.0000000000005934 (MRI in 33 mid-face HA patients: all still showed HA, none fully resolved two years after injection; 12 had gone over five years without an injection, one over 15 years.)
- Magacho-Vieira FN, Santana AP. Displacement of Hyaluronic Acid Dermal Filler Mimicking a Cutaneous Tumor: A Case Report. Clin Cosmet Investig Dermatol. 2023;16:197-201. PMID: 36711075. DOI: 10.2147/CCID.S398014 (A 15mm nodule 10 months after HA in the nasal radix; 22MHz ultrasound confirmed an encapsulated HA pseudocyst; removed under ultrasound guidance.)
- Rho NK, Youn CS, Youn SJ, Lee S, Kim HS. A comparison of the safety, efficacy, and longevity of two different hyaluronic acid fillers in filler rhinoplasty: A multicenter study. Dermatol Ther. 2021;34(1):e14707. PMID: 33368945. DOI: 10.1111/dth.14707 (28 women after a single nose HA session: the change in facial profile persisted at 48 weeks.)
- Master M, Roberts S. Long-term MRI Follow-up of Hyaluronic Acid Dermal Filler. Plast Reconstr Surg Glob Open. 2022;10(4):e4252. PMID: 35433153. DOI: 10.1097/GOX.0000000000004252 (Single case: HA almost completely degraded in the chin at 19 months, while persisting in the lateral face and deep mid-face fat.)
- de Castro Costa M, Andrade CA, Dantas RVF, Germani M, Buzalaf MAR, Soares DG. Clinical Durability of Hyaluronic Acid-Based Dermal Fillers for Facial Application: A Systematic Review. Aesthetic Plast Surg. 2026;50(5):1971-1993. PMID: 41261256. DOI: 10.1007/s00266-025-05435-1 (24 studies, 1,410 patients; ultrasound studies reported persistence of 12–36 months.)
- Beneduce N, Botter C, Coiante E, Hersant B, Meningaud JP. The longevity of the nonsurgical rhinoplasty: A literature review. J Stomatol Oral Maxillofac Surg. 2023;124(1S):101319. PMID: 36280110. DOI: 10.1016/j.jormas.2022.10.018 (16 studies on nonsurgical rhinoplasty; the longest reported duration was 8 years.)
- Lau E, Bohórquez JMC, Schelke L, Velthuis PJ, Ascher B, Cartier H, et al. Persistent HA Fillers and Nasal Broadening: Role of Ultrasound in Managing "Avatar Nose". J Craniofac Surg. 2025. PMID: 40146331. DOI: 10.1097/SCS.0000000000011283 (3 patients: the nasal bridge broadened years after a single HA injection; ultrasound confirmed residual HA, and ultrasound-guided hyaluronidase improved the contour.)
- Chang JR, Baharestani S, Salek SS, Piluek WJ, Eberhart CG, McCulley TJ. Delayed Superficial Migration of Retained Hyaluronic Acid Years Following Periocular Injection. Ophthalmic Plast Reconstr Surg. 2017;33(3S Suppl 1):S116-S118. PMID: 25902386. DOI: 10.1097/IOP.0000000000000434 (3 periocular cases: retained HA up to 9 years; all improved after biopsy and hyaluronidase.)
- Kalmanson OA, Misch ES, Terella A. Hyaluronic acid fillers may be longer-lasting than previously described: A case report of delayed filler-associated facial cellulitis. JPRAS Open. 2022;33:37-41. PMID: 35722166. DOI: 10.1016/j.jpra.2022.05.011 (Facial cellulitis 2.5 years after HA; MRI confirmed residual filler, proposed as a reservoir for bacterial infection.)
Editorial Review: This article is educational information, not individual medical advice. Whether HA residue remains in the nose, and the choice between dissolving and removal, must be decided case by case after an in-person physician assessment and ultrasound evaluation. Actual treatment and outcomes vary by individual.
