How much does this treatment cost?

Belgian law of 23 May 2013 does not allow aesthetic medicine fees to be published on a website. I share them with you personally: they are in the care guide, which I send you by e-mail on request, just below. The exact amount depends on the quantity needed; it is set in a written estimate before any treatment.

Does a lip injection hurt?

The lips are a sensitive area. The gel usually contains a local anaesthetic, lidocaine, and an anaesthetic cream can be applied before the session. The discomfort is usually brief.

How long do the lips stay swollen?

Swelling is very common after a lip injection. It decreases within a few days and most often disappears within two weeks, as does bruising. That is why the result is assessed at the review, not the next day.

How long does the result last?

The effect usually remains visible for at least six months; at one year, it persists in only some people. Duration varies with the gel, the quantity and the individual, and resorption is gradual.

I get cold sores: can I have a lip injection?

Mention it before the session: preventive antiviral treatment may be prescribed. If a cold sore is active, the session is postponed until it has fully healed.

What happens at the review around day 15?

Your lips are photographed and measured as at the first consultation: same photos, same measurements. We compare, then decide together whether to add more, wait or add nothing. If a correction is needed, hyaluronidase can dissolve the gel; that is a medical decision. This appointment is booked online with the reason “Follow-up after a treatment”.

Which signs mean I should call the practice straight away?

Intense or unusual pain, pale, mottled or purplish skin, or a visual disturbance, during or after the injection. These signs may point to a vascular complication, which is treated as an emergency. The practice's direct contact details are given to you after the injection.

Who performs the treatment?

I perform every injection myself. A nurse assists me at each session: preparation, asepsis, blood draw for PRP and monitoring. Two carers for you, and the medical act remains the doctor's, as Belgian law requires.

Injection · lips

Hyaluronic acid lip injection in Anderlecht

Name: Hyaluronic acid lip injection in Anderlecht
Creator: Dr Selim Zengin
Published: 2026-10-17

Start from your proportions, proceed with restraint.

Session length: 30 to 45 minutes
Anaesthesia: Local anaesthetic built into the gel
Onset: Immediate, assessed at about 2 weeks
Duration of effect: Often 6 to 12 months, variable
Back to social life: Immediate; lips often swollen for a few days

Understanding the treatment

How the treatment works, and what it is for.

Injected in small amounts, a hyaluronic acid gel can redefine a fading contour, give the lips a more hydrated look, soften a slight asymmetry or add measured volume to a thin lip. The request is discussed with adults, based on the examination and the proportions of your face.

The result depends on your anatomy, your tissues and how you react: it is neither guaranteed nor permanent. The gel is gradually resorbed, and hyaluronidase can dissolve it when a medical correction is indicated.

Areas treated

The areas treated at the practice. Another area bothers you? We discuss it in consultation.

Lip contour
Cupid's bow
Body of the lips

What I will not promise you

What is worth knowing before you decide.

Lips identical to a photo or to someone else's: every mouth has its own proportions.
Significant volume from the first session: the quantity stays cautious.
A permanent result: the gel is gradually resorbed.
Perfect symmetry: an asymmetry of bone or dental origin calls for a different approach, which we discuss together.

What happens during the session

What happens on the day of the treatment.

Prior consultation: Questions, examination, standardised photographs, written information and estimate.
Anaesthesia: Gel containing a local anaesthetic, lidocaine; anaesthetic cream if needed.
Injection: Fine needle or blunt-tip cannula, depending on the area.
Quantity: Small amounts injected slowly; less the first time.
Traceability: Product and batch recorded in the file.
Location: Anderlecht practice, Avenue du Roi-Soldat 79, 1070 Anderlecht
Review at day 15: Same photos, same measurements, to assess the change and adjust if needed.

The consultation covers your medical history, medication, allergies and what you would like to change or keep. Your face is photographed under standardised conditions (front, profiles, three-quarter views; same distance, same light), then measured by computer using the practice's facial measurement method.

You receive written information and an estimate. With your written consent, the treatment takes place the same day, straight after the consultation.

Aftercare and risks

Preparation, aftercare instructions, contraindications, side effects and warning signs, to read before the treatment.

Preparation and aftercare

Before the session

Tell us if you are pregnant or breastfeeding, have an autoimmune condition, a known allergy, and about any current medication.
If you have had cold sores and the area is near the mouth, tell us: preventive treatment may be offered.
Anticoagulants or aspirin: tell us, and never stop prescribed medication without your doctor's advice.
Avoid dental treatment in the two weeks before and after the session.
Avoid alcohol the day before.
Plan an important event more than two weeks later: mild swelling or bruising can last a few days.

After the session

Swelling, tenderness and sometimes bruising are usual in the first days and most often clear within two weeks. Avoid scheduling the injection just before an important event.
Avoid intense exercise, sauna, steam room, sun exposure and massaging the area for forty-eight hours.
Unusual pain, pale, mottled or purplish skin, visual disturbance: contact the practice immediately. Also let us know about a cold sore.
A review is offered around day 15, once the swelling has settled.

How long the effects last

The effect usually remains visible for at least six months. At one year, it persists in only some people: between a quarter and a half, depending on the study. Duration depends on the gel, the quantity, lip movement and the individual. Resorption is gradual, with no sudden drop; a new treatment is never automatic and is decided after reassessment.

Safety and warning signs

Contraindications

Pregnancy and breastfeeding: safety not established, the treatment is postponed
Active infection or cold sore on or around the lips: the session is postponed until fully healed
Coagulation disorders or an unassessed anticoagulant treatment
History of allergy to a component of the gel, including lidocaine, or severe allergies with a history of anaphylaxis
Active autoimmune disease: decided case by case, on medical advice

Adverse effects and complications

Common and transient: swelling, tenderness, bruising, redness, small palpable irregularities. On the lips, swelling is very common: it affected more than one person in two in clinical trials. These reactions settle on their own, most often within two weeks.

Cold sore flare-up: the injection can trigger a cold sore in people prone to them. Mention it before the session: preventive antiviral treatment may be prescribed.

Less common: nodules, delayed inflammatory reaction, sometimes weeks or months after the injection (for example after a viral infection or dental treatment), infection, displacement of the product requiring correction.

Rare but serious: vascular occlusion, meaning an artery is blocked by the gel. Warning signs: intense or unusual pain, blanching of the skin, then mottled or purplish skin. Without prompt treatment, the skin can become necrotic; visual disturbances have exceptionally been reported after facial injections. Treatment is urgent: hyaluronidase injected without delay and repeated until circulation returns. A written emergency protocol and hyaluronidase are available at the practice, and direct contact details are given to you after the injection.

Frequently asked questions

The questions I am asked most often.

Appointments and access

Where this treatment takes place: address, access and hours.

This treatment is carried out at the Anderlecht practice, in Brussels: Avenue du Roi-Soldat 79, 1070 Anderlecht. By public transport: metro 5 (Veeweyde station), line 81 (Ysaye stop), buses 46 and 75. Street parking; allow extra time at peak hours. Hours: Monday 13:00–18:00 · Wednesday 13:00–18:00, by appointment. The doctor consults in French, Turkish or English.

During the works, this part of line 81 is served by a replacement bus. Check the STIB information before you set off.

Request an appointment The Anderlecht practice: map and access

Sources

The publications this page is based on.

Before any procedure

You receive a written estimate and written information after the examination. With your agreement, the treatment takes place the same day. The choice is yours, with no advance payment. Results vary from one person to another.

The care guide, including the fee details, is sent to you personally by e-mail.

I examine you before every treatment and ask for your written consent. If the treatment is unsuitable for you, I will explain why, simply.

Written and reviewed by Dr Selim Zengin, general practitioner, INAMI 1 07696 83 003, university diploma in facial aesthetic medicine and mesotherapy, Université Paris Cité. Last reviewed: 17 October 2026.

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We look together at what concerns you. You leave with a clear opinion, even when that opinion is to wait or do nothing for now.

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