Severe allergy: can I have filler?

The short answer: a patient with a severe allergy can, in some cases, have filler, but not in every case and never without a detailed medical history. What decides it is the allergy trigger, the severity of the reaction and whether any component of the procedure is related to it. When in doubt, the safe path is to postpone and request an assessment from the physician who follows the patient.

This page is for answering that question with judgment, without clearing by reflex and without declining out of fear. It does not replace your clinic's protocol or clinical judgment.

What does "severe allergy" mean in the medical history?

Patients say "I have an allergy" about very different things: itching with dust, a reaction to adhesive tape, anaphylactic shock from a medication. To decide, you need to separate what actually happened. In the medical history, it is worth asking:

• What was the substance or trigger (food, medication, latex, sting, anesthetic)?
• What was the reaction: hives, swelling of the lips and tongue, shortness of breath, drop in blood pressure, fainting?
• Was emergency care, epinephrine or hospitalization needed?
• When was the last time and did it recur?
• Do they carry an epinephrine auto-injector or are they followed by an allergist?

A previous hypersensitivity reaction involving breathing or circulation is a different risk category from a skin allergy. The form template is in HOF medical history form.

Which components of the procedure deserve attention?

Even when the trigger has no obvious connection, it is worth reviewing everything that comes into contact with the patient that day:

For botulinum toxin, reading the insert is detailed in protein allergy and botulinum toxin. With hyaluronic acid, hypersensitivity reactions are described as rare, but they exist, and can appear late.

Does an allergy test settle it?

Some professionals do a prior test with a small amount of the product. The usefulness of this test is debated, and it does not eliminate the risk of a reaction during the procedure. Treat it as one more piece of data, not as clearance. More in filler allergy test.

When to postpone or decline?

In general, postponing is reasonable when:

• the allergy is recent or has not been clarified;
• there was a severe reaction to a medication that will be used in the procedure;
• the patient is in an active allergic flare, with hives or intense rhinitis;
• the patient cannot say what happened and there is no report.

Declining is a legitimate decision and should be recorded. The refusal form exists for that. See also the general contraindications in HOF.

How to prepare for a reaction in the office?

A severe reaction is rare, but preparation is not optional. It usually includes a trained team, a checked emergency kit and a plan to call emergency services. The items are in emergency kit for the HOF office and initial management in anaphylaxis in the HOF office.

With hyaluronic acid, have hyaluronidase available, both for vascular complications and for delayed hypersensitivity reactions; allergy to the enzyme itself is discussed in hyaluronidase, allergy and testing.

What to tell the patient?

Allergic patients often hear "you can" or "you can't" with no explanation. A clear conversation reduces anxiety and builds trust.

Where does Harmy fit in?

Harmy does not assess allergy or clinical risk. It comes in at the consultation, after the clinical decision: it shows through the projection the planned change for the marked areas, which helps the allergic patient, who often decides cautiously, see the plan before any injection.