A red, hot or swollen lump needs a doctor the same day, or A&E if no doctor can see you today: see infection after filler.
A lump that keeps coming back or flares red can be a granuloma: see filler granuloma.
Published 26 October 2026 · Reviewed by Dr Sin Yong
Hard lumps can follow any filler or skin booster, sometimes years later, and many patients are told surgery is the only option. Cutting filler out leaves a scar, can leave a dent and can injure the nerves that move the face, and it cannot be undone. In Dr Sin Yong's practice, almost every hard lump, from any type of filler or skin booster, silicone included, is treated without surgery. Get assessed first.
Short answerGet assessed before you agree to surgery. A hard lump after filler or a skin booster is usually product that has gathered in one place, sits too close to the surface or is layered with other products, or the body's reaction to it (Convery 2021; Ianhez 2024). Ultrasound shows what the lump is likely made of and how deep it sits (Wortsman 2015). Hyaluronic acid is dissolved. Dr Sin Yong treats everything else, including collagen stimulators, mixed products and silicone, with the Sculpting mode of Time Freeze Laser LCLR®, without an incision. A red, hot or tender lump needs a doctor the same day, or A&E if no doctor can see you today, and is treated medically first.
Only offered surgery? Read this before you agree to it
Patients come to Dr Sin Yong after being told a filler lump has to be cut out, or that nothing can be done. Before you agree to an operation, know what it means:
A scar. Every cut through the skin of the face heals with a scar.
A dent. Cutting out a lump takes tissue with it, and the area can heal hollow or uneven.
Nerve injury. Nerves that give the face feeling and movement run close to where filler sits. An injured nerve can leave numbness, or weakness in a smile, a lip or a brow.
Product left behind. Filler spread through tissue is hard to remove completely, and some patients need more than one operation (Garlaschi 2026).
No way back. Tissue that has been cut out cannot be put back.
In Dr Sin Yong's practice, almost every hard lump is treated without surgery. He maps each lump with ultrasound, dissolves hyaluronic acid, and treats material that cannot be dissolved with the Sculpting mode of Time Freeze Laser LCLR®, for nodules large and small, without an incision. If yours is one of the few lumps that needs surgery, you are told plainly, and why.
60-second hard lump check
Not for emergencies. A change in vision or eye pain after filler: call 995 now. Difficulty breathing, a tight throat, swelling of the tongue or throat, or swelling that spreads quickly across the face: call 995 now. Pale, dusky or mottled skin, or pain that is getting worse: go now to the doctor who injected you, or to A&E. A red, hot or draining lump, or a fever: a doctor the same day; if no doctor can see you today, A&E. Do not use this check or WhatsApp for these signs.
Answer three questions and send them straight to the clinic on WhatsApp. Dr Sin Yong will let you know whether an ultrasound assessment is worthwhile. No obligation.
1 · When was it injected?
2 · What bothers you most?
3 · Have you been offered surgery for it?
Your answers open in your own WhatsApp app; nothing is stored on this page.
Which fillers and skin boosters can cause hard lumps?
Any injected product can leave a lump. The type of product matters, because it decides what can be dissolved and what cannot.
Swipe sideways to see the whole table.
Product
Examples
Dissolved by hyaluronidase?
How Dr Sin Yong approaches a lump
More detail
Hyaluronic acid filler
Most lip, cheek, chin and under-eye fillers
Yes
Ultrasound-guided hyaluronidase, after a skin test
“For hard lumps from mixed products, I use one tool, Time Freeze Laser LCLR®, to target the material without surgery.”
Dr Sin YongOn hard lumps from mixed fillers and skin boosters
Why hard lumps form, sometimes months later
Most lumps are product that has gathered in one place, was placed too close to the surface, or sits together with other products from earlier treatments. Imaging work on non-inflammatory nodules has looked at the tissue layer in which filler sits when nodules form (Schelke, Dermatol Surg 2023).
Motion graphic, not to scale: how a hard lump forms after filler and skin boosters, how ultrasound maps it, and how the Sculpting mode of Time Freeze Laser LCLR® targets the excess.Video transcript
How a hard lump forms after filler and skin boosters. Diagram, not to scale.
A cross-section of facial tissue builds up layer by layer: skin, fat, muscle and bone.
Different products, same area: hyaluronic acid filler, skin booster and collagen stimulator, placed at different times.
They merge into one firm lump with a thin capsule, pressing on surrounding tissue. Small red vessels can show above it.
An ultrasound probe glides across the skin, mapping the material and its depth; the lump outline is traced in gold.
Time Freeze Laser LCLR®, Sculpting mode: laser energy is directed at the mapped area, built to target the excess material.
Ultrasound first. No incision. Response varies from person to person. Dr Sin Yong, Orchard Road, Singapore.
Some lumps are the body's reaction to the product. Delayed-onset nodules after hyaluronic acid filler can appear weeks to months after treatment (Convery 2021). After collagen-stimulating fillers, nodules were the most common problem in a published series of 55 complications and usually appeared more than a month after treatment (Ianhez 2024). Inflammatory nodules can appear days to years after treatment, after temporary fillers such as hyaluronic acid as well as non-absorbable ones, while non-inflammatory nodules usually appear soon after injection and reflect where the product was placed (Ledon 2013).
Rarely, a lump is a foreign-body granuloma, a reaction around the product (Wang 2025). True granulomas are uncommon, tend to appear months to years after injection, and can affect all treated sites at the same time (Lemperle 2009).
Ultrasound first: what the scan helps show
High-frequency ultrasound helps show what a lump is likely to be made of, how deep it sits, how far it spreads and which vessels run nearby. Different fillers tend to look different on the scan (Wortsman 2015), and ultrasound has been proposed to make hyaluronic acid filler treatment safer (Schelke 2018). In a series of palpable nodules after hyaluronic acid filler, high-frequency ultrasound told filler deposits apart from granulomas, fibrosis and inflammation, each with a typical appearance (Mlosek 2021).
Illustrative image — not a patient.
The scan also helps show when a lump is not product at all: swelling, fluid, a cyst or a lymph node can feel like filler under the finger. Dr Sin Yong performs the scan himself, and the plan follows what it finds.
What happens at a hard lump assessment
History. What was injected, where and when, what has been tried and what you were offered. Having no records is fine.
Examination. The lump is felt and photographed for your own comparison.
Ultrasound. Each lump is mapped: likely material, depth, size and nearby vessels.
A plan in writing. What is dissolved, what is treated with the Sculpting mode, what is better left alone, and what decides the fee.
Hyaluronic acid. Before planned dissolving, Dr Sin Yong always does a skin test: a small amount of hyaluronidase is injected just under the skin to check for a reaction. A small first dose follows, with a review at about 48 hours; further doses are titrated to what remains (King 2018). More on this is in hyaluronidase allergy and the skin test.
Material that cannot be dissolved. The Sculpting mode of Time Freeze Laser LCLR® is directed at the mapped lump, without an incision.
Review. Each lump is reassessed, because lumps respond differently, and any further visit is planned from what is seen.
Ellansé nodules, Juvelook clumping and Sculptra lumps
Ellansé nodules, and only offered surgery?
Ellansé is polycaprolactone, which hyaluronidase does not dissolve. Dr Sin Yong maps Ellansé nodules with ultrasound and uses the Sculpting mode for nodules large and small, without an incision. See Ellansé nodules and correction.
Juvelook clumping nodules, and only offered surgery?
Juvelook is poly-D,L-lactic acid in a hyaluronic acid carrier. Only the carrier responds to hyaluronidase, so clumping nodules need a different approach. See Juvelook lumps and clumping nodules.
Sculptra and Radiesse lumps
Poly-L-lactic acid and calcium hydroxylapatite cannot be dissolved either. Calcium hydroxylapatite focal accumulations have a structured treatment approach in the published literature (McCarthy 2024). See Sculptra lumps and Radiesse lumps.
Red, hot or tender lumps: medical treatment first
A lump that is red, hot, tender, draining or growing quickly may be inflammation or infection. It is treated medically first, before any device is considered, as expert consensus recommends (Urdiales-Gálvez 2018). A lump like this, a fever, or feeling unwell with a swollen lump needs a doctor the same day; if no doctor can see you today, A&E. Spreading redness with a fever, or feeling faint, confused or very unwell: call 995 or go to A&E now.
Urgent: a change in vision or eye pain after filler means calling 995 now. Skin that turns pale, dusky or mottled, or pain that is getting worse, needs urgent assessment by the doctor who injected you, or at A&E, now. See the warning signs of a blocked blood vessel after filler.
Abnormal lumps: when a lump may be something else
Not every lump after a filler or skin booster is the product. A lump that keeps growing, sits where nothing was injected, feels fixed to deeper tissue, changes the skin over it, or comes with swollen glands elsewhere is assessed for other causes. Ultrasound helps show whether it looks like filler; where it does not, further tests are arranged rather than treating it as filler.
Cysts, swollen lymph nodes and lumps of fat are common under the skin of the face and neck, and they are managed differently from filler.
Surgery or treatment without an incision: what each involves
Swipe sideways to see the whole table.
Approach
What it involves
Incision
Considerations
Surgical removal
Cutting the lump out through the skin
Yes
A scar; a dent or uneven contour where tissue is removed; risk of nerve injury; product can be left behind; cannot be undone
Sculpting mode of Time Freeze Laser LCLR®
Laser directed at the mapped lump
None
Can cause blistering or a change in skin colour, so settings are chosen for your skin
Hyaluronidase
Enzyme injection into mapped hyaluronic acid
None; fine needle
Acts on hyaluronic acid only; skin test first
Medical treatment
Treatment for inflammation or infection
None
Comes first for a red, hot or tender lump
Waiting
Review over time
None
Some small lumps that cannot be seen are reasonably left alone
Dr Sin Yong explains the risks and limits of each option at the assessment, including waiting where that is reasonable. Get assessed before you agree to surgery: an operation can still be done later if it is ever needed, but it cannot be undone.
Tried other treatments and almost given up?
Many patients who come to see Dr Sin Yong about hard lumps after filler or skin boosters tell him they have tried almost everything else and had given up hope. Having tried other treatments does not mean nothing more can be done: what is done next depends on what the scan shows.
That history is useful. Knowing what was injected, when, and what has already been tried often explains why a problem has stayed: hyaluronidase acts only on hyaluronic acid and only where it reaches, some fillers are not hyaluronic acid at all, and swelling or fluid can look like filler. Ultrasound helps show which of these applies, and the plan starts from there. For material that cannot be dissolved, Dr Sin Yong uses the Sculpting mode of Time Freeze Laser LCLR® for nodules large and small, without an incision. How each person responds varies.
If you have been told nothing more can be done, it is still worth having the area scanned: ultrasound helps show what is there, and the plan is made from that. Bring any records of past treatments, product names and dates if you have them. More on this is in when filler dissolving has not worked.
Every kind of filler lump, one page each
Each kind of lump, and each product, has its own page, with what the scan shows and what Dr Sin Yong does:
A blue tint rather than a lump.The Tyndall effect: filler that sits too close to the surface shows through thin skin.
Emergencies and operations.Filler necrosis: skin that is dying after a blocked blood vessel, which needs urgent, more intensive care than a lump does. And filler removal surgery: what an operation involves, before you agree to one.
Pale, dusky or mottled skin after filler, or pain that is getting worse, needs urgent assessment by the doctor who injected you, or at A&E, now. A change in vision or eye pain: call 995 now.
How Dr Sin Yong treats hard lumps without surgery
Dr Sin Yong developed the Time Freeze Laser LCLR® protocol himself and performs every scan and treatment himself on Orchard Road. He has been invited to share his clinical expertise in Seoul, Dubai, Bangkok and São Paulo, including as a Global Key Opinion Leader.
He does not add more product to hide a lump. Where the face has lost shape because of lumps, that is considered only after they have been addressed, so that new material is not placed on top of old. More on the laser is in the Sculpting mode of Time Freeze Laser LCLR®.
Your next step
Not for emergencies. A change in vision or eye pain after filler: call 995 now. Pale, dusky or mottled skin, or pain that is getting worse: go now to the doctor who injected you, or to A&E. Do not message or book for these signs.
1. MessageWhatsApp +65 8023 7170 with what is bothering you. A reply comes from the clinic, not a bot.
2. AssessmentDr Sin Yong examines you himself on Orchard Road, with ultrasound where earlier filler is involved.
3. A plan in writingWhat he would do, what he would not, the fee factors, and the option of no treatment.
Every treatment is performed by Dr Sin Yong personally. Singapore Medical Council registered · invited to share his clinical expertise internationally for CLASSYS, DEKA, Fotona, Hironic and Ilooda.
Some do. Small bumps from swelling, or from filler that has not yet settled, often ease as the area settles. A nodule that lasts can persist for years: hyaluronic acid can stay in the tissue that long, and collagen stimulators break down only slowly. If the nodule is the hyaluronic acid itself, it is dissolved after a scan and a skin test. Dr Sin Yong treats nodules that cannot be dissolved with the Sculpting mode of Time Freeze Laser LCLR®, without an incision.
Filler can feel firm while it settles. A hard area that lasts is usually product gathered in one place or sitting too close to the surface. Less often, the body walls the filler off with inflammatory cells and scar tissue (fibrosis): that is how a granuloma forms, and silicone and gel fillers can harden years later. Ultrasound shows which it is likely to be. A hard lump that is red, hot or swollen needs a doctor the same day, or A&E if no doctor can see you today.
Yes. Hyaluronic acid can stay in the tissue for years, and a lump or swelling can first appear long after the injection, sometimes after an infection elsewhere in the body. Granulomas, a reaction around the filler, can follow any filler months or years later, as can lumps from silicone and other non-absorbable fillers. A late lump is scanned before anything is decided. One that is red, hot, painful or swollen needs a doctor the same day, or A&E if no doctor can see you today.
Usually, yes. In Dr Sin Yong's practice, almost every hard lump is treated without surgery. Each lump is mapped with ultrasound; hyaluronic acid is dissolved, and material that cannot be dissolved, including Ellansé, Sculptra, Juvelook, Radiesse and silicone, is treated with the Sculpting mode of Time Freeze Laser LCLR®, without an incision. Cutting filler out leaves a scar and can cause dents or nerve injury, so get assessed first.
Cutting filler out means an incision, and every incision leaves a scar. Removing a lump takes tissue with it, so the area can heal with a dent or an uneven contour. Nerves that give the face feeling and movement run close by, and an injured nerve can leave numbness or weakness. Filler spread through tissue can be left behind, and some patients need a second operation (Garlaschi 2026). Surgery cannot be undone.
Many of the patients Dr Sin Yong sees have tried other treatments first. A treatment that did not help can still leave options open: hyaluronidase may not have reached the filler, the filler may not be hyaluronic acid, or what looks like filler may be swelling or fluid. Ultrasound helps show which applies, and the plan follows what it finds.
Get assessed before you agree to it. What can be done depends on what the lump is made of, which ultrasound shows. Hyaluronic acid can be dissolved. Collagen stimulators such as Ellansé, Sculptra, Radiesse and Juvelook cannot, and neither can silicone; for these Dr Sin Yong uses the Sculpting mode of Time Freeze Laser LCLR®, without an incision. Bring any records of what was injected and what you were told.
Usually not. Get assessed first. Silicone cannot be dissolved, and because it spreads into the tissue around it, cutting it out can leave scars, dents and product behind. Dr Sin Yong maps silicone lumps with ultrasound and treats them with the Sculpting mode of Time Freeze Laser LCLR®, without an incision. Get assessed before you agree to an operation.
Any of them. Hyaluronic acid fillers can form lumps when product gathers, sits too close to the surface or provokes a delayed reaction. Collagen stimulators, including polycaprolactone, poly-L-lactic acid, poly-D,L-lactic acid and calcium hydroxylapatite, can form nodules. Silicone can cause lumps years later, and layered products from different treatments often sit together in one hard lump.
Yes. Small bumps straight after a skin booster are expected and usually settle as the swelling eases. A firm lump that stays, or appears later, is different and is worth a scan, especially where boosters and fillers have been placed in the same area over time. Late nodules are uncommon but have been reported (Cassuto 2020), and the approach depends on what the scan shows.
Usually, yes. Ellansé is polycaprolactone and cannot be dissolved with hyaluronidase, but that does not mean it has to be cut out. Dr Sin Yong maps Ellansé nodules with ultrasound and treats nodules large and small with the Sculpting mode of Time Freeze Laser LCLR®, without an incision. The laser has its own risks, which are explained at the assessment.
Usually, yes. Juvelook is poly-D,L-lactic acid in a hyaluronic acid carrier, and only the carrier responds to hyaluronidase. For clumping nodules, Dr Sin Yong uses the Sculpting mode of Time Freeze Laser LCLR® after mapping them with ultrasound, without an incision. Get assessed before you agree to surgery.
Lumps can appear late. Delayed-onset nodules after hyaluronic acid filler have been described weeks to months after treatment, and after collagen stimulators nodules usually appeared more than a month later in a published series. A new lump long after treatment is worth assessing, and one that is red, hot or tender needs a doctor the same day, or A&E if no doctor can see you today.
Only if the lump is hyaluronic acid. Hyaluronidase has no effect on polycaprolactone, poly-L-lactic acid, calcium hydroxylapatite or fat, which is why the scan comes first. Before any planned dissolving, Dr Sin Yong always does a skin test, injecting a small amount just under the skin to check for a reaction.
You often cannot tell by touch alone. A lump that keeps growing, sits where nothing was injected, feels fixed to deeper tissue or comes with swollen glands elsewhere is assessed for other causes. Ultrasound helps show whether it looks like filler, and where it does not, further tests are arranged.
That can be inflammation or infection and needs a doctor the same day, or A&E if no doctor can see you today, not a planned laser visit. A change in vision or eye pain after filler is an emergency: call 995 now. Skin that turns pale, dusky or mottled, or pain that is getting worse, needs urgent assessment by the doctor who injected you, or at A&E, now.
Dr Sin Yong performs the ultrasound scan, the dissolving and every Sculpting mode treatment himself, on Orchard Road. It is not delegated to another doctor, a nurse or a therapist, so the same doctor follows each lump from the first scan to the last review.
References
Delayed-onset Nodules (DONs) and Considering their Treatment following use of Hyaluronic Acid (HA) Fillers. Journal of Clinical and Aesthetic Dermatology, 2021. source
Complications of collagen biostimulators in Brazil: Description of products, treatments, and evolution of 55 cases. Journal of Cosmetic Dermatology, 2024. source
Inflammatory nodules following soft tissue filler use: a review of causative agents, pathology and treatment options. American Journal of Clinical Dermatology, 2013. source
Foreign Body Granulomas Reaction Related to Collagen Stimulatory Cosmetic Fillers: A Systematic Review. Journal of Cosmetic Dermatology, 2025. source
Foreign body granulomas after all injectable dermal fillers: part 1. Possible causes. Plastic and Reconstructive Surgery, 2009. source
Investigating the anatomic location of soft tissue fillers in noninflammatory nodule formation: an ultrasound-imaging-based analysis. Dermatologic Surgery, 2023. source
Identification and Complications of Cosmetic Fillers: Sonography First. Journal of Ultrasound in Medicine, 2015. source
Ultrasound to improve the safety of hyaluronic acid filler treatments. Journal of Cosmetic Dermatology, 2018. source
The use of high-frequency ultrasonography for the diagnosis of palpable nodules after the administration of dermal fillers. Journal of Ultrasonography, 2021. source
A Structured Approach for Treating Calcium Hydroxylapatite Focal Accumulations. Aesthetic Surgery Journal, 2024. source
The Use of Hyaluronidase in Aesthetic Practice (v2.4). Journal of Clinical and Aesthetic Dermatology, 2018. source
Safety Assessment of High- and Low-Molecular-Weight Hyaluronans (Profhilo®) as Derived from Worldwide Postmarketing Data. BioMed Research International, 2020. source
Complex Surgical Management of PDLLA-Induced Lower Eyelid Granulomas. Journal of Craniofacial Surgery, 2026. source
About this page: written and medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last reviewed 26 October 2026 · Illustrative images only, not patients · Editorial policy
Not for emergencies. A change in vision or eye pain after filler: call 995 now. Pale, dusky or mottled skin, or pain that is getting worse: go now to the doctor who injected you, or to A&E. Do not message or book for these signs.
