Botox vs. Filler: What's the Difference, and Why You Might Actually Need Both

By Sabrina Mitson, PA-C, Aesthetic Injector

"Do I need Botox or filler?" is one of the most common questions I hear in consultations, and it makes total sense. Both are injectable, both are non-surgical, and both are marketed side by side at nearly every medspa. But they work in completely different ways, treat completely different concerns, and in a lot of cases, the best results come from using them together rather than picking just one. Let's break it down.

The Short Answer

• Botox (and other neuromodulators like Dysport and Xeomin) relax the muscles that cause movement-related wrinkles — think forehead lines, crow's feet, and the "11s" between your brows.

• Dermal filler (like Juvederm and Restylane) adds volume and structure. Think cheeks, lips, under-eyes, jawline, and smoothing static wrinkles or folds that are visible even when your face is at rest.

In other words: Botox stops a wrinkle from forming. Filler restores volume that's already been lost or enhances a feature. They're not competing treatments, they're solving two different problems.

Botox: How It Works and What It Treats

Botox and other neuromodulators temporarily block nerve signals to targeted muscles, which softens the repeated muscle movement that eventually creases skin into permanent lines. It's most effective for:

• Forehead lines

• Frown lines (glabellar lines, aka the "11s")

• Crow's feet around the eyes

• Bunny lines on the nose

• A "gummy smile"

• Jawline slimming (masseter treatment) and even TMJ-related jaw tension

• Neck banding (platysmal bands)

Results typically show up within 3–7 days and last 3–4 months on average, which is why most patients come in a few times a year for maintenance.

Filler: How It Works and What It Treats

Dermal fillers are gel-based products, most commonly made of hyaluronic acid, that add volume, shape, or hydration to areas that have lost structure either from aging, genetics, or facial anatomy. Common treatment areas include:

• Cheeks (restoring volume and lift)

• Under-eyes (softening hollows and dark circles)

• Lips (adding volume or refining shape)

• Nasolabial folds and marionette lines

• Jawline and chin (adding definition)

• Temples (a commonly overlooked area that affects overall facial balance)

Depending on the product and area treated, filler can last anywhere from 6 months to 2 years.

Why a Combined Treatment Plan Is So Common

Here's the part that often surprises new patients: in my practice, most patients who come in for "just Botox" or "just filler" actually benefit from a plan that includes both, and it's not about upselling. It's about how facial aging actually happens.

Aging isn't just wrinkles from movement, and it isn't just volume loss. It's usually both, happening at the same time. For example:

• A forehead with movement lines (Botox territory) can also have brow volume loss that affects how heavy the brow looks (filler territory)

• Marionette lines near the mouth are often a combination of muscle pull and volume loss in the cheek and jawline

• Under-eye hollows might be paired with a bit of upper cheek volume loss that, once addressed together, creates a much more natural, refreshed result than treating either area alone

When I build a treatment plan, I'm not looking at "what product do I want to use," I'm looking at your face and asking what's actually causing the concern you're pointing to. Sometimes that answer is Botox. Sometimes it's filler. Very often, it's a thoughtful combination of both, done conservatively and built up over time.

A Quick Word on Reddit Research

I see a lot of patients come in having done their homework on Reddit  which has unfiltered patient experiences comparing Botox and filler results. It's a genuinely useful resource for understanding what recovery feels like or seeing honest before-and-afters.

Just keep in mind: what someone on Reddit needed for their face say, "everyone said just get filler, skip the Botox," may not apply to yours. Facial anatomy, muscle strength, and aging patterns vary a lot person to person. Use those threads to get comfortable with the process and bring your questions to your consultation, not as a substitute for an actual assessment.

How to Know What You Need

The honest answer is: you probably won't know for certain until a qualified injector examines your face in person. A good consultation should include:

1. An assessment of both dynamic wrinkles (caused by movement) and static volume loss (visible at rest)

2. A conversation about your goals — subtle refresh vs. more noticeable change

3. A realistic, often phased plan, since combining treatments doesn't have to mean doing everything at once

4. Transparent pricing and expectations for how long results will last

The Bottom Line

Botox and filler aren't rivals, they're two different tools that address two different causes of facial aging. If you've been going back and forth on which one to book, the better question to ask is: what is actually causing the specific thing bothering me? That answer usually points toward a plan, not just a product, and very often, that plan includes a little bit of both.

If you'd like a personalized recommendation, I'd be happy to walk through it with you in a consultation.

Sabrina Mitson, PA-C, is a licensed physician assistant specializing in aesthetic and cosmetic injectables, including neuromodulators (Botox, Dysport, Xeomin) and dermal fillers.