It's the most common mix-up we hear at consultations: Botox and filler are both injectables, both soften signs of aging, and both show up in the same Instagram captions, but they do opposite jobs. Here's the difference in plain language, and how to tell which one your face is actually asking for.
What does Botox actually do?
Botox (along with other brands like Dysport and Xeomin) is a muscle relaxer. It quiets the small facial muscles whose repeated contractions crease the skin: the frown lines between your brows, forehead rows, crow's feet when you smile. Relax the muscle and the skin above it stops being folded thousands of times a day, so the line softens and, with consistent treatment, often fades.
The key phrase is dynamic lines: lines caused by movement. If a wrinkle appears when you make an expression and mostly disappears when your face is at rest, that's Botox territory.
What does filler actually do?
Dermal filler doesn't touch muscles. It replaces volume. As we age, the fat pads and collagen that keep cheeks full and lips defined thin out, and skin settles into the space left behind: deeper smile lines, hollow under-eyes, flattened cheeks, thinner lips. Filler (most commonly hyaluronic acid, a substance your skin already makes) restores that support so the surface smooths and lifts.
The tell here is lines and hollows visible at rest. If the crease is there when your face is completely relaxed (especially in the lower face), volume, not movement, is usually the culprit.
The 10-second self-test
- Look in a mirror with a relaxed face. Lines you see right now → likely filler (or skin treatments), because they're etched or volume-related.
- Now frown, raise your brows, smile hard. Lines that appear with the movement → likely Botox.
- Both? That's common, and it's why combination plans exist.
Can you combine them?
Yes, and many patients eventually do: Botox to stop lines from deepening, filler to restore what's already settled. There's no requirement to do both: a good plan starts with the one change that bothers you most and builds only if you want more. If a treatment isn't the right tool for what's bothering you, we'll say so and point you to what is.
Not sure which side of the line your lines fall on? That's exactly what a complimentary consultation is for: we'll look with you and map it out, no commitment.
How they differ day to day
Timing: Botox takes 5–7 days to settle and lasts 3–4 months. Filler is visible immediately (with a few days of swelling) and typically lasts 6–18 months depending on the product and area: lips at the short end, structural areas at the long one.
Feel: Botox has no downtime for most people. Filler can bruise or swell for a few days. Plan around big events.
Reversibility: Botox wears off on its own. Hyaluronic-acid fillers can be dissolved by a clinician if needed, one reason we use them.