Patient With Unknown Previous Filler: What to Do

Every facial harmonization practitioner meets this patient: someone who had filler "a few years ago", in another city, from a practitioner who no longer sees patients, and who cannot say what was used. Sometimes they want more volume; sometimes they want to remove something that bothers them; sometimes they do not even remember the procedure until asked. In every case, the unknown product changes the risk, the predictability and the options for correction.

This guide outlines the approach at review level: what to ask, what to examine, when imaging helps, when to postpone and how to document. There is no technique or doses; decisions belong to the qualified practitioner, according to the rules of their professional board.

Why does an unknown product change everything?

Fillers behave very differently over time, and correction depends on the material:

Two practical consequences. First: injecting over a permanent or unknown material can stimulate inflammation, and the tissue response becomes less predictable. Second: hyaluronidase only works if hyaluronic acid is present, so promising to "remove it with the enzyme" is promising something that may not happen. The difference between temporary and permanent products, in the patient's language, is in does permanent filler exist?.

What to ask in the medical history?

The medical history is the cheapest tool and the one that pays off most. Ask the questions directly, because the patient does not usually connect an old procedure with today's visit.

• What, where and when. Areas treated, approximate year, number of sessions and interval between them.
• Who treated and where. Practitioner, clinic, city. Treatment outside a healthcare facility is a warning sign.
• What they were told about the product. "Permanent", "lasts forever", "no need to repeat" and "very low price for a lot of volume" suggest a permanent material.
• Documents. Product label, invoice, quote, photos of the vial, messages with the previous practitioner.
• Course over time. Swelling that comes and goes, hardening, nodules, redness, pain, change in shape over time.
• Triggers. Episodes of swelling after an infection, a vaccine, dental treatment or another procedure.
• General health. Autoimmune diseases, immunosuppression and allergies.

Patients have the right to request a copy of their record from the practitioner or clinic that treated them. Suggest that request: the label with name and lot number can settle in minutes a question the exam may not. The full list of questions is in medical history in facial harmonization.

Include one literal question on the form: "Have you ever had any filler, including 'permanent' ones or a product whose name you don't know?". Many patients answer "no" to "have you had filler?" because the procedure was ten years ago or was called something else.

What to look for in the clinical exam?

The exam does not identify the material with certainty, but it shows whether the area is stable or whether there are signs that change the priority.

Photograph using a standard, with the same lighting and framing, as in standardized clinical photography. Today's photos will be the baseline for follow-up comparison.

When does ultrasound help?

High-frequency ultrasound lets you see whether there is material in the area, in which layer, how far it extends and how the surrounding tissue reacts. The literature describes different image patterns for hyaluronic acid, silicone, PMMA and other materials, which can suggest the type of product, without replacing the documented history. It also helps map vessels before a new intervention and monitor a correction.

The limits count too: quality depends on the equipment and the experience of whoever performs the exam, and mixtures of products from different times complicate interpretation. The use of ultrasound in routine practice is discussed in ultrasound in facial harmonization.

What is the safest path?

In most cases, the prudent sequence is:

1. Listen and document the history, without judging the previous colleague.
2. Examine and photograph the area.
3. Look for the product record with the patient and with the previous practitioner.
4. Investigate with imaging when the history is not enough and the area will receive a new intervention, or when there are complaints.
5. Decide between not intervening, postponing, treating another area, correcting or referring.

"Not doing it now" is a legitimate technical answer. Treating areas without previous material while the doubtful area is investigated is often an alternative that preserves the relationship with the patient.

When to refer?

Refer when there is persistent inflammation, growing nodules, suspected chronic infection, permanent material with a complication or a need for surgical removal. A dermatology or plastic surgery assessment, or one from a service specialized in filler complications, may be needed. Management of biostimulator nodules is in nodules after biostimulator, and the patient with excess volume in overfilling: how to assess and correct.

And hyaluronidase as a "test"?

Sometimes applying hyaluronidase is discussed to see whether the area responds and thereby infer that hyaluronic acid was present. A partial response may suggest hyaluronic acid, but it does not rule out other mixed materials, and the enzyme has its own risks, including allergy, as discussed in hyaluronidase: allergy, testing and precautions. If this approach is considered, it is the decision of the qualified practitioner, with specific consent and aligned expectations: the enzyme may change nothing. See also does hyaluronidase remove all filler?.

How to document?

This patient's record needs to show that you asked, examined and decided based on what you found:

• history reported by the patient, in their own words when relevant ("they told me it was permanent");
• documents presented, or a note that none exist;
• exam findings and dated photos;
• tests ordered and results;
• proposed plan, alternatives and what the patient chose.

The informed consent should mention the presence of previous material of unknown nature and what that means for risk and predictability. If the patient refuses the investigation or the postponement, record the refusal, for example with the procedure refusal form template. General organization is in patient records and documentation in facial harmonization.

How to explain it to the patient?

And in Harmy?

Checklist for the patient with unknown previous filler

1. Literal question about previous fillers, including "permanent" ones, in the medical history.
2. Areas, dates, place and previous practitioner recorded.
3. Request for a copy of the record or product label advised.
4. Clinical exam and standardized photos of the area.
5. Inflammatory signs ruled out before any cosmetic decision.
6. Imaging considered when the area will receive a new intervention.
7. Plan with alternatives, including postponing or treating other areas.
8. Consent mentioning the unknown previous material, or the refusal recorded.
9. Referral defined for inflammation, progressive nodules or permanent material with a complication.