At least once a week someone tells us they want Botox in their smile lines, or asks whether filler will help their forehead.

The words get used interchangeably in conversation. The treatments do fundamentally different things, and picking the wrong one means paying for something that could not possibly have solved your problem.

The one-sentence version

Botox relaxes muscles. Filler adds volume.

That is the whole distinction and everything else follows from it.

Botox

A neuromodulator. It blocks the signal from nerve to muscle, so the muscle contracts less.

Because it works on movement, it treats lines caused by movement. Forehead lines, the 11s between your brows, crow's feet.

It does nothing for volume loss. If your cheeks have flattened or your nasolabial folds have deepened because the tissue above them descended, Botox has no mechanism to help.

Onset is 3 to 14 days. Lasts three to four months. Priced per unit, starting at $10 here.

Filler

Usually hyaluronic acid gel, placed under the skin to restore or add volume.

Because it works on volume, it treats hollowing and structural loss. Cheeks, temples, under-eye hollows, lips, jawline definition, and the folds that develop from midface descent.

It does nothing for muscle movement. Filling a deep forehead line without addressing the muscle that creates it is a temporary fix at best.

Results are immediate, with swelling settling over one to two weeks. Lasts six months to two years depending on product and placement. Priced per syringe.

Which one your specific concern needs

Horizontal forehead lines: Botox. 11s between the brows: Botox, and filler occasionally for a deeply etched static line after the muscle is relaxed. Crow's feet: Botox. Flat or hollow cheeks: Filler. Nasolabial folds: Filler, usually placed in the cheek rather than the fold itself. Thin lips: Filler. Also the lip flip, which is Botox, and they do different things. Under-eye hollows: Filler, and this is an advanced placement. Go to someone experienced. Marionette lines: Filler. Jaw clenching or a wide jawline: Botox in the masseter. Chin dimpling: Botox. Weak chin projection: Filler. Neck bands: Botox. Loose, sagging skin: Neither. That is Morpheus8 or a surgical conversation. Texture, pores, scarring: Neither. That is microneedling or resurfacing.

Why people confuse them

Both are injections. Both are done in the same room by the same provider. Both fall under the umbrella term injectables.

And the marketing does not help. Botox is used as a generic term the way Kleenex is, so people say Botox when they mean any injectable.

The combination question

Many people get both, and they complement each other well. A common approach is Botox for the upper face and filler for the midface.

If you are new to injectables, start with one. Learn how your face responds before adding variables. Most providers will recommend Botox first, because it is reversible by simply wearing off and filler is a longer commitment.

A caution on filler

Filler is more technically demanding than Botox and the complications are more serious. Vascular occlusion is rare and it is a genuine emergency.

Ask who is injecting you, what their training is, and whether they keep hyaluronidase on site. Any competent injector will answer all three without hesitation. If someone gets defensive, leave.

Start with a consult

Book an injectable consultation and we will tell you which one your concern actually needs.