Lumps After Filler: Normal Swelling, Nodule or Granuloma?
Medical Director Dr Sin Yong explains how to tell normal swelling from a filler nodule, an infection or a delayed inflammatory reaction, and what helps each one.
WhatsApp to Enquire →Key facts ↓Lumps after filler are usually swelling or product that has not yet settled, and most soften within one to two weeks. A lump still visible after that is often too much product, or product placed too close to the surface. A red, hot, tender or growing lump, or one that appears months later, needs assessment, because it may be infection or an inflammatory nodule.
- Late lumps are recognised: an international consensus lists nodules and granulomas among the late reactions to hyaluronic acid filler [1].
- How often: delayed inflammatory reactions after hyaluronic acid filler were estimated at about 1.1 per 100 treated people per year in prospective studies, and possible delayed-type hypersensitivity at about 0.06 per 100 per year [3].
- Timing: in a review of 52 delayed complications after tear trough filler, lumps or nodules made up 13 cases, and the average onset was 16.8 months after injection [6].
- Collagen stimulators: in a review of 5,081 calcium hydroxylapatite treatments, 166 of the 173 reported adverse events were nodules [9].
- Dissolvable: hyaluronidase can dissolve hyaluronic acid nodules and correct excess filler; it has no effect on collagen stimulators [7].
Are lumps after filler normal?
Some lumpiness in the first days after filler is normal: it is swelling, small bruises and product that has not yet integrated. Most of it settles within one to two weeks.
Hyaluronic acid filler draws in water and the tissue around it swells for a few days after the injection, so the area can feel firm, uneven or beaded, particularly in the lips and under the eyes. A small, soft irregularity you can feel but not see, which is a little smaller each day, is part of normal healing. Most adverse reactions to filler are mild and transient [2], and lumps in the first week fall into that group far more often than not.
What is not normal is a lump that stays visible after two to four weeks, one that is hot, red, increasingly painful or growing, and one that appears weeks or months after the area had settled. Those need to be examined, because they have different causes and need different treatment. For the full range of early and late problems, see the filler complications overview.
Swelling, nodule or granuloma: how do you tell them apart?
Timing and feel tell them apart: swelling is soft and early, a product nodule is firm and non-tender, and an inflammatory nodule or granuloma is tender and often appears late.
| Type of lump | Typical onset | What it feels like | Usual cause | What usually helps |
|---|---|---|---|---|
| Swelling | Hours to days | Soft, diffuse, improving daily | Normal tissue response to injection | Time, cold compresses, sleeping slightly propped up |
| Bruise or small haematoma | Hours to days | Tender, discoloured, sometimes a firm pea-sized knot | A small vessel bled at an entry point | Time; it fades over one to two weeks |
| Product nodule (non-inflammatory) | Visible once swelling settles | Firm, non-tender, same size over weeks | Too much product in one place, or too superficial | Waiting if small; dissolving if hyaluronic acid |
| Infection or abscess | Days to a couple of weeks | Red, hot, increasingly painful, sometimes fever | Bacteria introduced at injection | Urgent medical treatment; not massage |
| Delayed inflammatory nodule | Weeks to years | Tender, red or swollen, may come and go | Immune reaction, sometimes after illness, dental work or vaccination | Assessment and stepwise medical treatment |
| Granuloma | Months to years | Firm, may be tender, may grow slowly | Foreign-body reaction to the material | Specialist assessment; treatment depends on product |
A lump that you can only feel is less of a concern than one that can be seen, and a lump that is non-tender is less of a concern than one that is tender. Delayed lumps can be confused with each other even by doctors, which is why examination, and sometimes an ultrasound scan, comes before treatment [8].
How long do lumps last after filler?
Swelling-related lumps usually settle within one to two weeks and small irregularities within about four; a lump still visible after a month rarely resolves quickly.
- Days 1–3. Swelling peaks. The area can feel firm and uneven; lips and under-eyes look most irregular now.
- Days 4–14. Swelling fades and most irregularities soften. A bruise-related knot may take a little longer.
- Weeks 2–4. The product has largely integrated. This is the point at which the result is judged, and many clinics, including IN Eternity Clinic, review at around two weeks.
- After a month. A visible lump that has not changed is usually product in the wrong amount or layer. Hyaluronic acid can persist for years [11], so waiting much longer rarely helps.
Under the eyes, swelling and small irregularities can take longer to settle than elsewhere, and the thin skin shows more; the day-by-day course is in the tear trough filler recovery guide. In the lips, small beads along the lip line are common in the first week; lip filler side effects covers what is normal there.
When to seek urgent help
Most lumps are not urgent. These signs are different: they can mean that filler is blocking a blood vessel, or that infection is developing, and they need action the same day, and for the first four signs the same hour.
- Skin that turns pale or white (blanching) during or soon after the injection
- Severe pain, or pain that keeps increasing, rather than settling
- Mottled, dusky, blue-grey or purple patches, often in a net-like or branching pattern
- Any change in vision: blurring, a shadow, double vision, loss of part of the visual field, or eye pain
- A lump that is red, hot and increasingly painful, especially with fever or feeling unwell: contact the clinic the same day
What to do: contact the clinic that treated you immediately, by phone or WhatsApp, and say that you have had filler and what you are seeing; a photograph helps. For any change in vision, go to the nearest emergency department straight away (in Singapore, call 995 if you cannot get there safely). Do not wait to see whether it settles, and do not try to treat it yourself at home.
IN Eternity Clinic patients: WhatsApp or call +65 8815 3008. If you were treated elsewhere, contact that clinic first, because they know which product was used and where; if you cannot reach them, seek medical care without delay.
What causes a filler lump that does not go away?
A persistent lump is usually too much product in one spot, product too close to the surface, a firm gel in thin skin, or new filler over old.
Most filler complications relate to volume and injection technique, though some relate to the material itself [2]. In practice the common patterns are:
- Volume in one place. A bolus that is too large for the space shows as a bump, particularly in the lips and around the mouth.
- Superficial placement. Product close to the surface shows as a ridge or bead, and under thin skin can look blue; see the Tyndall effect.
- The wrong gel for the area. A firm, cohesive gel intended for deep support can feel lumpy where the skin is thin or moves a lot.
- Old product underneath. Filler that has not been absorbed, sometimes from years earlier, adds to the new; MRI has shown hyaluronic acid persisting for years [11].
- Movement of product. Filler that has spread from where it was placed can collect as a lump elsewhere; see filler migration.
Pressing on a lump to flatten it can help a very small, soft irregularity in the first days if the treating doctor advises it, but it does not move a firm deposit and can inflame an infected or reactive one.
“An early lump is usually a question of amount and depth. A late lump is usually a question of the immune system. Treating the second as if it were the first is how a small problem becomes a long one.”
Why do lumps appear months after filler?
Lumps that appear months or years later are usually delayed inflammatory reactions: the immune system reacts to filler already in the tissue, often after an illness.
Dental work or vaccination can also be triggers. These reactions are uncommon. A systematic review estimated delayed inflammatory reactions after hyaluronic acid filler at about 1.1 per 100 treated people per year in prospective studies, and possible delayed-type hypersensitivity at about 0.06 per 100 per year [3]. They tend to appear as tender, swollen or red lumps, sometimes in several treated areas at once, and they can come and go.
Some delayed nodules are linked to biofilm, a low-grade colony of bacteria on the filler that the body cannot easily clear; increasing evidence implicates biofilm in delayed filler reactions [5]. Because infection, inflammation and simple excess product look alike from the outside, an international panel of 18 experienced doctors proposed a stepwise approach rather than one fixed treatment [4]. The specific medicines are chosen by the doctor after examination; they are not something to start on your own.
Under the eyes, delayed problems can appear well over a year after treatment: in the tear trough review, the average onset was 16.8 months, and swelling was the most common delayed problem, followed by lumps [6].
Can filler lumps be dissolved?
Hyaluronic acid lumps can usually be dissolved with hyaluronidase. Lumps from calcium hydroxylapatite, polycaprolactone or poly-L-lactic acid cannot, so they are managed differently.
Hyaluronidase is an enzyme that breaks down hyaluronic acid, and it can dissolve subcutaneous nodules and correct excess filler [7]. At IN Eternity Clinic, filler correction starts with an ultrasound scan to see what the lump is, where it sits and whether it is product, swelling or something else; the enzyme is then placed into the deposit in small amounts, and the area is reviewed at about two weeks before anything further is done. Ultrasound also allows hyaluronidase to be guided into the deposit itself [8].
An inflamed delayed nodule is not always dissolved first. Where infection or an immune reaction is suspected, that is usually treated before, or instead of, dissolving, following a stepwise plan [4].
For non-HA products, options include waiting, medical treatment of an inflamed nodule, or, for excess Ellansé or Sculptra mapped on ultrasound, Time Freeze Laser LCLR®, decided at assessment. Products and their lumps are compared in collagen stimulator side effects; for poly-L-lactic acid specifically, see Sculptra side effects and nodules.
What Dr Sin Yong looks for
- When the lump appeared relative to the treatment, and whether it is getting bigger, smaller or coming and going.
- Whether it is soft or firm, tender or not, and whether the skin over it is red, warm or discoloured.
- Which product was used and how long ago; if unknown, what the ultrasound shows about its depth and echo pattern.
- Recent illness, dental work, vaccination or new medicines, which can trigger delayed reactions.
- Lumps in other treated areas, which point to an immune reaction rather than a local placement problem.
General clinical observations used at consultation; they describe what is checked, not any individual result.
Do skin boosters and collagen stimulators cause lumps?
Yes, but differently. Skin boosters raise small bumps that usually flatten within hours to days; collagen stimulators can form firm nodules weeks to months later that do not dissolve.
The small raised bumps after skin boosters in Singapore are the product sitting in the skin and are expected; they are covered in skin booster side effects. Collagen stimulators behave differently. With calcium hydroxylapatite, nodules made up 166 of the 173 adverse events reported across 5,081 treatments in one review [9], and nodules after poly-L-lactic acid or polycaprolactone are mostly linked to placement that is too superficial, too concentrated or too heavy in one spot.
How are lumps after filler prevented?
Lumps are prevented mainly by choosing the right product for the area, placing it at the right depth in modest amounts, and checking for old filler before adding more.
- Conservative amounts. Small volumes, built up over more than one session where needed, rather than everything at once.
- The right layer. Deep, structural product near bone; soft gels for thin or mobile areas; under the eyes, small amounts placed deep, usually with a fine cannula.
- Old filler checked. Earlier filler can be mapped with ultrasound before new product is added, so that product is not layered on product.
- Clean technique. Skin antisepsis and single-use sterile needles and cannulas lower the risk of infection and, probably, of biofilm.
- Timing around illness and dental work. Treatment is usually postponed during infection and around dental work, and recent vaccination is discussed.
Most filler treatments are successful [10], and following these principles keeps it that way more often. For how fillers are planned area by area, see dermal fillers in Singapore.
Frequently asked questions
Is it normal to have lumps after filler?
Yes, in the first days. Swelling, small bruises and product that has not settled can feel lumpy, particularly in the lips and under the eyes, and usually soften within one to two weeks. A lump that is still visible after two to four weeks, or that is red, hot, painful or growing, should be checked.
How long do filler lumps take to go away?
Swelling-related lumps usually settle within one to two weeks, and small product irregularities within about four weeks. A lump that has not changed after a month is usually product in the wrong amount or layer, and hyaluronic acid can persist for years, so assessment is more useful than waiting much longer.
Should I massage a lump after filler?
Only if the doctor who treated you advises it. Gentle pressure can help a small, soft irregularity in the first days, but it will not move a firm deposit and can worsen an infected or inflamed lump. Red, hot, tender or growing lumps should be examined rather than massaged.
Why did a lump appear months after my filler?
Late lumps are usually delayed inflammatory reactions, where the immune system reacts to filler already in the tissue, sometimes after an illness, dental work or vaccination. They are uncommon, estimated at about 1.1 per 100 treated people per year in prospective studies. They need examination before treatment.
Can hyaluronidase dissolve a filler lump?
If the lump is hyaluronic acid, usually yes. An ultrasound scan first shows what and where the lump is, and the enzyme is placed into it in small amounts, with a review at about two weeks. Hyaluronidase has no effect on calcium hydroxylapatite, polycaprolactone or poly-L-lactic acid.
What is a filler granuloma?
A granuloma is a cluster of immune cells that forms around material the body treats as foreign. After filler it is rare and usually appears months or years later as a firm, sometimes tender, slowly growing lump. It needs specialist assessment, because treatment depends on the product and on whether infection is present.
Is a hard lump after filler dangerous?
Usually not. A firm, non-tender lump that stays the same size is most often product in one place. A lump becomes a concern when it is hot, red, increasingly painful, growing or accompanied by fever, or when the skin around it turns pale or dusky, which needs same-day contact with the clinic.
Can I have more filler if I have a lump?
Not until the lump has been assessed. Adding filler to balance a lump usually adds weight without fixing the cause, and an inflamed lump can flare with more product. Once the lump has been treated and the area has settled, further filler can be considered if it is still needed.
Book an assessment
IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, Singapore 228210. By appointment with Medical Director Dr Sin Yong. Monday to Saturday, 11am to 8pm. WhatsApp or call +65 8815 3008. At IN Eternity Clinic a consultation fee applies, and it is waived if you go ahead with any medical treatment; the fee is S$120.
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References
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- Funt D, Pavicic T. Dermal fillers in aesthetics: an overview of adverse events and treatment approaches. Clin Cosmet Investig Dermatol 2013;6:295-316. doi:10.2147/CCID.S50546
- Chung KL, Convery C, Ejikeme I, Ghanem AM. A systematic review of the literature of delayed inflammatory reactions after hyaluronic acid filler injection to estimate the incidence of delayed type hypersensitivity reaction. Aesthet Surg J 2020;40(5):NP286-NP300 (online 2019). doi:10.1093/asj/sjz222
- Artzi O, Cohen JL, Dover JS, et al. Delayed inflammatory reactions to hyaluronic acid fillers: a literature review and proposed treatment algorithm. Clin Cosmet Investig Dermatol 2020;13:371-378. doi:10.2147/CCID.S247171
- Ibrahim O, Overman J, Arndt KA, Dover JS. Filler nodules: inflammatory or infectious? A review of biofilms and their implications on clinical practice. Dermatol Surg 2018;44(1):53-60 (online 2017). doi:10.1097/DSS.0000000000001202
- Trinh LN, McGuigan KC, Gupta A. Delayed complications following dermal filler for tear trough augmentation: a systematic review. Facial Plast Surg 2022;38(3):250-259 (online 2021). doi:10.1055/s-0041-1736390
- Cavallini M, Gazzola R, Metalla M, Vaienti L. The role of hyaluronidase in the treatment of complications from hyaluronic acid dermal fillers. Aesthet Surg J 2013;33(8):1167-1174. doi:10.1177/1090820X13511970
- Schelke LW, Decates TS, Velthuis PJ. Ultrasound to improve the safety of hyaluronic acid filler treatments. J Cosmet Dermatol 2018;17(6):1019-1024. doi:10.1111/jocd.12726
- Kadouch JA. Calcium hydroxylapatite: a review on safety and complications. J Cosmet Dermatol 2017;16(2):152-161. doi:10.1111/jocd.12326
- DeLorenzi C. Complications of injectable fillers, part I. Aesthet Surg J 2013;33(4):561-575. doi:10.1177/1090820X13484492
- 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. doi:10.1097/GOX.0000000000005934
These sources describe mechanisms and general evidence. They are not a promise of any individual result; suitability is decided at an in-person assessment.