Lip filler — a doctor's checklist for getting a natural result

The difference between bad lip filler and good lip filler is mostly the assessment, not the product. Bad lip filler comes from injectors who weren't honest about what shouldn't be done. Good lip filler — the kind that has people asking if you've slept well or had a holiday — comes from a clinical conversation that's willing to say no.

This is the checklist I run through with every patient who comes in asking for lip filler.

What lip filler actually does (briefly — the longer version is on the treatment page)

Lip filler is hyaluronic acid, the same molecule your body produces naturally. We inject it into specific anatomical zones of the lip to add volume, define a border, correct asymmetry, or restore lost tissue. It is reversible — there's an antidote — and the result lasts six to twelve months on average.

Now the actual checklist.

1. What is the patient asking for, and why?

This sounds basic, but it's the first place treatments go wrong. A patient who wants "fuller lips" because she's just turned twenty-three is a different conversation from a patient who wants "her lips back" because they've thinned over the past decade.

I want to know the specific words a patient uses about her own lips. "Thin" is different from "asymmetrical" is different from "deflated" is different from "flat." Each of those points to a different treatment plan, or sometimes to no treatment at all.

2. What does the lip actually need?

Once I know what the patient is asking for, I look at what the lip will tolerate without losing its shape. The lip has two parts that matter: the body (the soft volume) and the border (the defined edge). They age and respond differently. Adding volume to a lip that has lost its border definition will produce a flat, sausage-shaped result. Adding border definition to a lip that has lost volume will produce a sharp, painted-on look. The sequence and the proportion matter more than the total quantity.

3. What is the patient's existing facial proportion?

A natural-looking lip is one that fits the face. The proportion of upper lip to lower lip should usually sit around 1 to 1.5. The relationship between the lip and the chin matters. The relationship between the lip and the nose matters. If a patient has a narrow lower face, very full lips will look top-heavy. If she has a long midface, full lips help balance it. Photographs from when she was younger are useful — not as a target, but as a baseline of what the face has always been doing.

4. Has she had filler before?

Lip filler accumulates if it isn't fully metabolised between sessions. A patient who has had filler twice a year for the last five years may have significantly more product in her lip than she realises. Adding more on top is what produces the over-filled look that everyone says they're trying to avoid. Sometimes the right intervention isn't more filler — it's dissolving what's there and starting again.

5. What are her contraindications?

Active herpes simplex (cold sore prevention with antivirals if there's a history). Pregnancy or breastfeeding. Anticoagulant therapy without medical clearance. Connective tissue disease. Recent dental procedures. Certain medications. None of these are necessarily absolute, but each changes the conversation.

Who I won't treat

I won't treat a patient who asks for "more" without being able to articulate what she actually wants the lip to do. I won't treat a patient whose existing filler has migrated above the vermilion border or who has visible nodules in the body of the lip — that's a dissolve-and-restart conversation, not a top-up. I won't treat a patient who shows me photos of celebrity lips that bear no relation to her own face. And I won't treat a teenager.

Where it fits in the REGEN Method

Lip filler sits in the Generate pillar — it's a structural intervention rather than a regenerative one. For the right patient, in the right proportion, it earns its place. For most patients, it works alongside other regenerative work — Profhilo for skin quality, polynucleotides for the perioral fine lines, anti-wrinkle for the upper-lip lines that filler alone can't address. The whole face is the unit, not the lip on its own.

The honest closing

If you've been thinking about lip filler and you're not sure whether you're a good candidate, the answer almost always is: maybe — let's look at it properly. The patients who get the best result are the ones who came in willing to be told no. The patients who get the worst result are the ones who came in convinced they knew what they wanted and brought a photograph.

That's what the Reveal Consultation is for. We look at what your face is actually doing, what your lip would tolerate, and whether filler is the right answer at all.

— Dr Chris, Founder and Medical Director, REGEN Clinic

Want the full clinical detail and pricing? Visit the Lip Filler treatment page.