Vaginal Filler · Patient guide

What If I Don't Know What Vaginal Filler Was Injected?

If you do not know what vaginal filler was injected, it can still be identified and removed safely. The steps are to request records from the injecting clinic, image the lump with ultrasound, give a test dose of hyaluronidase to check for hyaluronic acid, and, if surgery is needed, send removed tissue for histology. At Somssi Women's Clinic in Gangnam, Seoul, Dr. Yoon Ho-joo uses this sequence for every unknown filler.

Medically reviewed by Dr. Yoon Ho-joo, MD, PhD, OB/GYN specialist, Somssi Women's Clinic · Last updated October 2026

At a glance

Key facts

The essentials, based on how Somssi Women's Clinic performs this procedure or answers this question. Your plan is confirmed at consultation.

• Step 1: request product name, lot number and volume from the injecting clinic
• Step 2: examination and pelvic ultrasound to see the deposit's texture, depth and spread
• Step 3: hyaluronidase test dose; softening within 1 to 2 days means HA
• Step 4: if no response, plan surgical removal; histology confirms the material
• Hospital stay: none for any step
• What not to do: accept repeated dissolving attempts on a lump that never changes
• Assessed by: Dr. Yoon Ho-joo, MD, PhD, OB/GYN specialist

Not knowing what filler you were given is common and does not prevent safe treatment: the material can be identified by a combination of records, ultrasound, a hyaluronidase test dose and, if surgery is needed, histology of the removed tissue. What matters is working through those steps in order rather than guessing.

Why patients often do not know

Vaginal filler is frequently injected at cosmetic clinics that describe the product only as filler, use a brand name the patient does not recognize, or inject a mixture. Some patients were treated abroad, some years ago, and some at clinics that have since closed. In the clinic's experience, roughly half of removal patients arrive without a clear record of the product. None of this is your fault, and none of it rules out treatment.

Step 1: try to get the records

Contact the clinic that performed the injection and ask in writing for the product name, manufacturer, lot number, volume and date. Clinics in most countries are required to keep this information and to release it to the patient. Even a photograph of the syringe box or the receipt helps. If the clinic refuses or no longer exists, move to the next steps; the lack of records is a nuisance, not a barrier.

Step 2: examination and ultrasound

Somssi Women's Clinic is a surgical gynecology clinic in Gangnam, Seoul, founded in 2000 and led by Dr. Yoon Ho-joo, MD, PhD. For an unknown filler, Dr. Yoon starts with a careful examination: when did the lump appear, is it soft or hard, mobile or fixed, tender or painless, and is it where the injection was given or somewhere else? Each answer narrows the field. A soft, mobile lump that appeared within weeks suggests HA; a hard, fixed nodule that appeared a year later suggests a permanent product or a granuloma.

Pelvic ultrasound then shows the deposit directly. Hyaluronic acid appears as dark, fluid-like pockets. Polylactic acid, PMMA and calcium fillers look dense and bright, often with shadowing behind them. Silicone has a characteristic snowstorm appearance. Granulomas look like solid, irregular masses. Ultrasound also shows how deep the material sits and whether it has spread, which matters for surgical planning.

Step 3: the hyaluronidase test dose

If the examination and ultrasound suggest the filler could be hyaluronic acid, a small dose of hyaluronidase is injected into the lump under local anesthesia after a sensitivity check. The area is reviewed a day or two later. If the lump has softened or shrunk, the filler is HA and dissolving can be completed. If nothing has changed, the material is not HA, or it is HA that has become walled off in a granuloma, and the plan moves to surgery. Our guide on dissolving HA vaginal filler explains the enzyme in more detail.

A word of caution: a test dose is one or two injections. If a clinic has given you several rounds of hyaluronidase and the lump has never changed, further dissolving is pointless and the material should be assumed to be non-dissolvable.

Step 4: surgical removal and histology

When the material is not HA, or its identity is still unclear, surgical removal answers the question definitively. Dr. Yoon maps the deposit on ultrasound, peels the overlying mucosa to under one millimeter with fine micro-scissors, removes the deposit together with its capsule and reconstructs the wall in two layers with the patient's own tissue. The removed tissue can be sent to a pathology laboratory, where the material is identified under the microscope. This matters for your records and for any future treatment. The procedure is described on the permanent filler removal page.

How the unknown changes the plan

Why identification matters

Injecting hyaluronidase into a PMMA or silicone deposit does nothing except delay treatment and add cost. Operating on a lump that was simply HA exposes a patient to surgery she did not need. Identifying the material first, even when the records are gone, is what keeps treatment proportionate. It also tells you whether the filler will ever go away on its own: HA fades, PLA resorbs over a year or two leaving collagen, and PMMA and silicone are permanent.

When to see a doctor

Have an unknown filler assessed promptly if there is a growing lump, pain with intercourse, redness, discharge or fever, or if the lump has appeared in a place that was never injected. Even a painless lump is worth an ultrasound, because knowing what is there lets you plan calmly rather than react to a complication later.

Bottom line

Not knowing what was injected is a solvable problem. Records, examination, ultrasound and a test dose identify most fillers within a day or two, and histology after removal confirms the rest. Read the main vaginal filler removal page for the procedure, or tell the clinic what you do know and Dr. Yoon will take it from there.

Questions patients ask

Frequently asked questions

Short, honest answers. For anything personal, a consultation is the right place to ask.

See the full FAQ →

Can an unknown filler be removed safely?

Yes. The identification steps, especially ultrasound and a hyaluronidase test dose, tell the surgeon what to expect before any operation. Surgical removal works on every filler type, so even if the exact product is never named, the deposit and its capsule can be taken out and the tissue reconstructed.

Is a hyaluronidase test dose risky if the filler turns out not to be HA?

No. Hyaluronidase simply has no effect on non-HA materials. The only risks are a rare allergic reaction, which is screened for first, and brief softening of the surrounding tissue, which recovers. A test dose is a low-risk way to avoid unnecessary surgery.

Can a blood test or scan identify the filler?

There is no blood test for filler type. Ultrasound is the most practical imaging and distinguishes HA from permanent products in most cases. MRI can help with deep or complex deposits but is rarely needed. Histology of removed tissue is the only definitive identification.

What if the clinic that injected me says it was HA but it will not dissolve?

Then it is either a blend containing a non-dissolvable component, HA that has become walled off in a granuloma, or the record is wrong. All three are treated the same way: surgical removal of the lump with its capsule. The removed tissue can be examined to settle the question.

Should I bring anything to the consultation?

Any written record, receipt, photograph of the product box or message from the injecting clinic, plus a note of when the injection was done and when symptoms started. Also bring a list of your medications and allergies. If you have nothing, come anyway; the examination and ultrasound do most of the work.

Keep reading

Related treatments and guides

• Vaginal Filler Removal — the full procedure page for every filler type
• Vagina Filler Removal — what a visit to Somssi involves
• Can Vaginal Filler Be Removed? — overview of materials and methods
• Vaginal Filler Removal vs Dissolving: Which Do I Need? — what the identification leads to
• Vaginal Filler Lumps and Nodules: What Causes Them? — reading the clues a lump gives
• Vaginal Filler Removal in Korea for Foreigners: Complete Guide — what to send before you travel

Sources and medical review

• US Food and Drug Administration, dermal filler safety communications and labeling information
• American College of Obstetricians and Gynecologists (ACOG), guidance on elective female genital cosmetic procedures
• Te Linde's Operative Gynecology, chapters on vaginal surgery and complications

Next step

A consultation first. A decision only when you are ready.

Tell us what you are experiencing and what you hope to change. Dr. Yoon examines, measures and explains the options, including when no surgery is the right answer. International patients can start with an online consultation before travelling to Seoul.