Radiesse gone wrong, and only offered surgery? Get assessed first

Blocked vessel, infection or allergy after Radiesse: act at once

Urgent: a change in vision or eye pain after filler: 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. See the warning signs of a blocked blood vessel after filler.

Skin that is dying after a blocked blood vessel (necrosis) is an emergency. It needs urgent, more intensive care than a lump does, starting now.

Radiesse is placed in the cheeks, the folds beside the nose and mouth, the jawline, the chin and sometimes the temples, where blood vessels run close, and a blocked blood vessel is a risk with any injection there. With Radiesse there is nothing to dissolve the filler quickly: hyaluronidase has no effect on calcium hydroxylapatite, and a medical treatment described for it acts slowly and is not effective in an emergency (Wollina 2024). If Radiesse blocks a vessel, going now to the doctor who injected you or to A&E matters all the more; care is then supportive, with referral where needed. Where hyaluronic acid sits in the same area, or the product was a hybrid such as HArmonyCa, hyaluronidase can act on the hyaluronic acid part, and it is not delayed for a skin test. A blocked vessel is never treated with the Sculpting mode or any other laser.

What to look for

• Colour. Skin in or near the treated area that turns white or pale, then dusky, purple or net-like (mottled): urgent assessment by the doctor who injected you, or at A&E, now.
• Pain. Pain that is severe, or getting worse rather than settling: urgent assessment by the doctor who injected you, or at A&E, now.
• Later signs. Blisters, crusts, dark scabs or broken skin over the area mean the skin is already short of blood: urgent assessment by the doctor who injected you, or at A&E, now.
• Eyes. Blurred or lost vision, double vision, or pain in or around the eye: call 995 now.
• Stroke signs. New weakness of the face, an arm or a leg, or slurred speech: call 995 now, and do not travel to a clinic first.

These signs usually appear during or soon after the injection, sometimes later: act whenever they appear, whoever injected the filler and whatever it was. Do not massage the area, put heat on it, or wait for a message reply, a booked review or the colour to settle. If your vision is affected, call 995 and do not drive yourself.

Red, hot, swollen or draining

• A red, hot, painful, swollen or draining lump, or a fever: see a doctor the same day; if no doctor can see you today, go to A&E. It may be infected or inflamed, and it is treated medically first, before any dissolving, any device and any talk of surgery. Infected hyaluronic acid is dissolved only once the infection is under control; dissolving never replaces treating the infection. Dr Sin Yong sees these lumps the same day.
• A lump that is growing quickly: see a doctor the same day; if no doctor can see you today, go to A&E. Do not wait for a planned laser visit.
• Redness that is spreading, with a fever; feeling faint, confused or very unwell; or swelling around the eye with pain: call 995 or go to A&E now.
• Difficulty breathing, a tight throat, swelling of the tongue or throat, or swelling that spreads quickly across the face, after any injection, including hyaluronidase, can be a serious allergic reaction: call 995 now. Itch, hives or swelling that spreads beyond the treated area: contact the clinic that injected you the same day.

A collection of pus can need draining through a small opening alongside medical treatment; that is a smaller procedure than an operation to cut a lump out. More on this is in infection after filler.

Radiesse gone wrong, and only offered surgery? Read this before you agree to it

Patients come to Dr Sin Yong after being told that a Radiesse lump has to be cut out, or that nothing can be done because Radiesse cannot be dissolved. It is true that it cannot be dissolved: hyaluronidase, the enzyme that dissolves hyaluronic acid filler, has no effect on calcium hydroxylapatite. Material that cannot be dissolved can still be treated without an incision.

One thing comes before any talk of surgery. If your vision has changed or your eye hurts, call 995 now. If the skin is turning pale, dusky or mottled, or the pain is getting worse, get urgent assessment by the doctor who injected you, or at A&E, now. See act at once, above. For everything else, 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.
• 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. If yours is one of the few that needs surgery, you are told plainly, and why. Dr Sin Yong maps Radiesse with ultrasound, treats a red, hot or tender lump medically first, and treats nodules and areas of excess with the Sculpting mode of Time Freeze Laser LCLR®, without an incision. Lumps from every kind of filler are covered in hard lumps after filler or skin boosters.

How early collections of Radiesse differ from later nodules, and where they show, is set out in Radiesse lumps and nodules, and the treatment itself, undiluted for structure or diluted for skin quality, in Radiesse in Singapore. This page is about what goes wrong, how often, whether Radiesse is safe, and what removal involves.

“A biostimulator cannot be dissolved. That single fact should shape every decision about using one.”

Dr Sin YongOn why some fillers do not dissolve

What Radiesse is, and why problems can appear late

Radiesse is calcium hydroxylapatite, a mineral similar to the one in bone and teeth, made into tiny smooth spheres (microspheres) and suspended in a gel carrier. On the day, much of the volume comes from the gel. The body absorbs the gel gradually, and the microspheres stay behind as a scaffold around which the skin lays down its own collagen. The body breaks the spheres down through its own processes, not through the enzyme that dissolves hyaluronic acid (Wollina 2024).

That two-stage behaviour explains many Radiesse problems. Because collagen builds around the spheres as the gel goes, too much product, or product in the wrong place, does not simply fade with the gel. Microspheres gathered in one place, close to the surface or under thin skin, can form a nodule you can feel or see, with collagen formed around it. A review of biostimulators adds that the immune response differs between products according to the size and shape of their particles, that material the body recognises as foreign follows a foreign-body pathway, and that injection technique and contamination also influence the response (Corduff 2025).

Undiluted, diluted and hybrid

Radiesse is used in two quite different ways. Undiluted, it is a firm product placed deep for structure, on the chin, jawline and cheeks and on the backs of the hands. Diluted (1:1) or hyperdiluted (1:2 or more), it is spread close to the surface for loose skin and fine wrinkles, an off-label use for which a global consensus has set out preliminary guidelines (Goldie 2018). A technique paper on the chin and jawline describes using calcium hydroxylapatite, a firm hyaluronic acid or a hybrid of the two depending on the goal, with small amounts at each injection point (Moradi 2019). A ready-made hybrid, HArmonyCa, combines hyaluronic acid with calcium hydroxylapatite microspheres in one syringe; lumps after it are covered in HArmonyCa lumps.

Like poly-L-lactic acid (Sculptra) and polycaprolactone (Ellansé), Radiesse is a collagen stimulator. Like Ellansé, and unlike Sculptra, it also fills on the day, from its gel carrier. What goes wrong after those two is covered in Sculptra gone wrong and Ellansé gone wrong, and how the three differ in collagen biostimulators in Singapore.

Radiesse side effects and swelling: what is expected, and what is not

Some effects are part of any Radiesse treatment and are not a sign that it has gone wrong:

• Swelling, tenderness and bruising where the needle went in, easing steadily as the area settles.
• Firmness where undiluted product sits, softening as the gel settles into the tissue.
• Fullness on the day, partly from the gel carrier and partly from the swelling that follows any injection.

In published work these effects are mostly mild. A safety review found injection-related events were local, short-term and mild, resolving within a few days (Pavicic 2013). For diluted and hyperdiluted use, a global consensus lists bruising, mild pain, swelling and firmness (induration) as injection-related effects (Goldie 2018).

Radiesse swelling: when it is not normal

Ordinary swelling eases steadily rather than growing. Swelling that behaves differently needs attention, and what to do depends on what comes with it:

• Swelling with skin that turns pale, dusky or mottled, or pain that is getting worse: urgent assessment by the doctor who injected you, or at A&E, now. A change in vision or eye pain: call 995 now.
• Swelling that is red, hot, painful or draining, or comes with a fever: see a doctor the same day; if no doctor can see you today, go to A&E.
• Swelling that appears later, or comes and goes, without redness or heat: not the usual after-effect. It can be a reaction to the material, or hyaluronic acid placed in the same area, and it is scanned; a non-inflamed hyaluronic acid lump is dissolved after a skin test. If it becomes red, hot or painful, see a doctor the same day (A&E if no doctor can see you today); it is treated medically first.
• Swelling that has gone, leaving one side fuller or a lump: that is product rather than swelling, and it is mapped.

Allergic reactions and other emergencies are set out in act at once, above. More on swelling after filler in general is in filler swelling.

Diluted and hyperdiluted Radiesse

Diluted Radiesse is spread in a thin layer close to the surface, on areas such as the neck, chest, arms and backs of the hands. The global consensus reports more adverse events when less-diluted product is placed too superficially in thinner, darker skin (Goldie 2018). Problems after diluted use can be small nodules or unevenness in thin skin rather than one large lump. They cannot be dissolved, but they can be treated without an incision: Dr Sin Yong treats them with the Sculpting mode, with settings chosen for the skin type.

Bad Radiesse: what goes wrong, described in words

This page shows no before-and-after photographs, in line with Singapore's rules on medical advertising. Instead, this is what goes wrong after Radiesse, described in words, and what Dr Sin Yong does about each. Nodules are the commonest problem, and many people have more than one of these.

Swipe sideways to see the whole table.

Most nodules in the large review could not be seen and settled without treatment (Kadouch 2017); later nodules can persist. Products often sit together, for example hyaluronic acid placed over older Radiesse, which is one more reason the scan comes first. Problems along the jaw and chin after any filler are covered in chin and jawline filler gone wrong.

Is Radiesse safe? How often problems are reported

No injectable is free of risk. Most side effects of Radiesse are mild, such as swelling, bruising and tenderness. Its specific risk is a nodule, and because it cannot be dissolved, a problem cannot be reversed the way hyaluronic acid filler can, although it can still be treated without an incision. The published numbers:

• About 3% in a large review. In 21 published studies covering 5,081 calcium hydroxylapatite treatments in 2,779 patients, 173 adverse events were reported (3%); 96% of them were nodules, and most could not be seen and settled without treatment (Kadouch 2017).
• Foreign-body reactions are rare. A safety review found only a handful of reported cases in about 10 years of use; trials with up to 3 years' follow-up reported no long-term or delayed adverse events, and no bone formation was reported (Pavicic 2013).
• Granulomas in published series. In an international ultrasound study of 240 granulomas after cosmetic fillers, 6.3% followed calcium hydroxylapatite and 50.4% hyaluronic acid (Wortsman 2025). In a systematic review of 117 patients with granulomas after collagen stimulators (PMMA, poly-L-lactic acid, calcium hydroxylapatite and polycaprolactone), 27% of reported cases followed calcium hydroxylapatite, after PMMA (35%) and poly-L-lactic acid (31%) (Wang 2025).
• Stubborn once they form. In 55 complications after collagen stimulators in general (poly-L-lactic acid, calcium hydroxylapatite and polycaprolactone), collected by ultrasound specialists in Brazil, nodules made up 89% and usually appeared more than a month after treatment, and only 5 resolved completely despite several treatments (Ianhez 2024).

These figures come from different kinds of study, with different products, areas and follow-up. The granuloma percentages describe the cases each study collected, not the risk with any one treatment. They show what can happen; they do not predict what will happen to you.

Radiesse problems years later

A lump that appears long after Radiesse is uncommon but recognised. In the systematic review of granulomas after collagen stimulators, granulomas across all four products appeared from 1 week to 15 years after injection, on average about 20 months, usually as nodules and most often around the mouth, with longer delays for non-degradable fillers (Wang 2025). A lump years later is not always Radiesse: it can be hyaluronic acid or another filler placed since, a granuloma, or something unrelated, which is why it is scanned before anything is done.

The serious risks of Radiesse are those of any injection near facial vessels, which is why the depth and the area matter as much as the product; the warning signs are set out in act at once, above. Thin, mobile skin shows even small collections, and in the lips Radiesse is an unapproved use: lumps there appear soon after injection and are clumps of the particles rather than a granuloma (Pavicic 2013), although one published case describes a granulomatous reaction inside the lip (Sankar 2007). Dr Sin Yong does not use Radiesse in the lips, under the eyes or between the brows. Who suits Radiesse, and where it is placed, is covered in Radiesse in Singapore.

Ultrasound first: what the scan shows after Radiesse

Ultrasound shows where the filler sits, how deep it is and how far it has spread, and what it is likely made of. After Radiesse that matters, because a lump can be calcium hydroxylapatite, hyaluronic acid placed with it or since, a granuloma, fluid, or something that is not filler at all.

Calcium hydroxylapatite is one of the easier fillers to recognise. In a series of 116 people with temple filler scanned in Beijing, 7 of them with hydroxyapatite, it showed as strongly bright deposits that cast an acoustic shadow, while hyaluronic acid showed as dark, well-defined pockets without blood flow (Jiang 2023). A review of filler ultrasound that includes calcium hydroxylapatite describes patterns specific to each material and characteristic features for complications such as a foreign-body granulomatous reaction, an abscess, migration and overfilling, and it calls high-frequency ultrasound with colour Doppler the first-line tool for identifying the type of filler, where it is and its complications (Khorasanizadeh 2026). Calcium hydroxylapatite also shows on X-rays and CT scans, so tell a radiologist or dentist that you have had it.

The scan also guides the plan. In a study of 231 patients with firm lumps after filler, ultrasound agreed with the tissue diagnosis in 85.7% of the 70 who had a biopsy, and the type of lump on the scan was linked to which approach did better (Wang 2026). That study did not use the Sculpting mode, and its figures do not apply to it. An international consensus of 15 experts from seven specialties calls ultrasound mandatory for managing filler complications (Velthuis 2025).

The scan shows what a lump is likely made of; it does not prove it. Where a lump does not look like filler, further tests are arranged. The authors of a published case of a lump in the lip after Radiesse note that infection, and a growth unrelated to the filler, must be ruled out (Sankar 2007). Dr Sin Yong performs the scan himself, and the plan follows what it shows. More on scanning is in ultrasound-guided filler correction.

Radiesse cannot be dissolved, but it can be treated without an incision

Hyaluronidase is an enzyme that acts on hyaluronic acid only. It has no effect on calcium hydroxylapatite or on the gel that carries it. In the series of 55 collagen-stimulator complications, saline, hyaluronidase, diluted medical treatment and energy-based devices were all used, only 5 cases resolved completely, and hyaluronidase helped only where calcium hydroxylapatite had been mixed with hyaluronic acid (Ianhez 2024). That study did not use the Sculpting mode, and its figures do not apply to it. Collagen-stimulator lumps are often stubborn.

Material that cannot be dissolved can still be treated without an incision. Dr Sin Yong maps the nodule with ultrasound, treats any inflammation medically first, and then treats it with the Sculpting mode of Time Freeze Laser LCLR®, his own protocol on a long-pulsed 755 nm and 1064 nm laser platform, directed at the mapped lump, without an incision. He uses it for nodules large and small, for areas of excess and for granulomas, including those with no filler left. Like any laser, it can cause blistering or a change in skin colour, so settings are chosen for your skin. Around the eyes he keeps the settings conservative and uses eye protection. A blocked blood vessel is an emergency and is never treated with the Sculpting mode or any other laser.

HArmonyCa, and Radiesse mixed or layered with hyaluronic acid

Hyaluronic acid can sit with Radiesse in three ways: mixed with it before injection, combined in a hybrid product such as HArmonyCa, or placed over or beside older Radiesse. Only the hyaluronic acid part can be dissolved. Your allergy history is checked, including any reaction to bee or wasp stings and any earlier hyaluronidase. 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 goes into the mapped hyaluronic acid, with a review at about 48 hours, because dissolving more than the excess can leave a hollow. In an emergency such as a blocked blood vessel, dissolving is not delayed for a skin test. What remains is then treated with the Sculpting mode, in a planned order. Dr Sin Yong does not inject more filler over a lump; any refilling waits at least two weeks after dissolving and is considered only once the lumps have been addressed. More is in HArmonyCa lumps and how hyaluronidase is used.

What published work describes

Published work also describes medical treatment injected into the lump: in the systematic review of granulomas after collagen stimulators, it was the commonest treatment (Wang 2025). That is a different approach from the Sculpting mode. The published options for non-inflamed Radiesse collections are set out in Radiesse lumps and nodules.

Radiesse removal: what surgery involves, and the published evidence both ways

Radiesse is not a gel sitting in a pocket. Once the gel has been absorbed, the microspheres sit in collagen the skin has laid down around them. Radiesse removal by surgery therefore means cutting out the nodule, through the skin or from inside the mouth, together with your own tissue around it, which is why a dent is a real risk. Along the jawline and in the cheeks, the operation also comes close to the nerves that move the face and give it feeling.

In one series of 31 patients operated on for contour problems after facial fillers in general, the team that operated found the dissection difficult because of scar tissue and granulomatous reaction; 2 patients had a collection of blood, 1 a collection of fluid and 1 a facial nerve injury, which improved after 4 months (Ghareeb 2022). In the published case of an inflamed lump inside the lip after Radiesse, new lumps appeared several weeks after the first, and only the first was cut out (Sankar 2007).

Where surgery has a place

Surgery has a place, and the published work says so. In the systematic review of 117 patients with granulomas after collagen stimulators, calcium hydroxylapatite among them, surgical removal often resolved symptoms (Wang 2025). In the ultrasound study of 231 firm lumps after filler of any kind, granulomas with no filler left, and hyaluronic acid with a granuloma, did better with invasive treatment, granulomas around filler other than hyaluronic acid did better with non-invasive treatment, and invasive treatment gave greater improvement overall (Wang 2026). That study did not use the Sculpting mode, and its figures do not apply to it. In the series of 31, the team found the facelift approach more demanding but more satisfying for major deformities after repeated injections (Ghareeb 2022). An abscess may need draining, and a lump that does not look like filler on the scan may need a tissue sample.

The point is the order: scan first, decide after. What the lump is on the scan, not simply that it is hard, decides what is treated without an incision and which few need an operation. A scan does not delay that decision: an operation can still be done later if it is ever needed, and it cannot be undone.

Radiesse removal options compared

Swipe sideways to see the whole table.

More on operations to take filler out is in filler removal surgery, and on granulomas in filler granuloma.

Tried other treatments and almost given up?

Many patients who come to see Dr Sin Yong about Radiesse that has gone wrong 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 shows 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 shows 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.

How Dr Sin Yong treats Radiesse gone wrong without surgery

1. History. What was injected, where and when, if known, undiluted or diluted, including any hyaluronic acid or other filler placed since; whether the lump has flared; what has been tried and what you were offered. Having no records is fine.
2. Ultrasound mapping. Dr Sin Yong scans each lump himself: where the product sits, how deep it is, how far it has spread, what it is likely made of and the vessels nearby.
3. Inflammation or infection first. A red, hot, tender or draining lump is seen the same day and treated medically before anything else.
4. Hyaluronic acid, if any. Where the scan shows hyaluronic acid, in HArmonyCa, mixed with the Radiesse or placed over it, that part is dissolved with hyaluronidase after a skin test: a small first dose, with a review at about 48 hours.
5. Radiesse itself. He treats nodules, granulomas and areas of excess with the Sculpting mode of Time Freeze Laser LCLR®, directed at the mapped lump, without an incision.
6. Further tests where needed. A lump that does not look like filler on the scan is not treated as filler; further tests are arranged.
7. Review. Each lump is reassessed, and any further visit is planned from what is seen.

He does not inject more Radiesse or other filler to hide a lump or to even out a heavy jaw or face. Where the face has lost shape, that is considered only after the lumps have been addressed. 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. More on the laser is in the Sculpting mode of Time Freeze Laser LCLR®.