Jaw Botox vs. Parotid Botox: What's Different?
Run your fingers along your jaw and the feel changes day to day — sometimes a hard ridge near your ear, sometimes a soft fullness just below it. Both get blamed on "a wide face," but the cause isn't always the same, and neither is the fix.
If you've run your fingers along your jawline and felt something different depending on the day — sometimes a hard ridge near your ear, sometimes a soft fullness just below it — you're not alone. Both sensations get lumped into the same complaint: your face looks wider than you'd like. But the two aren't caused by the same thing, and they don't respond to the same treatment.
Two Botox treatments get marketed for a slimmer lower face: jaw Botox (also called masseter Botox) and parotid gland Botox. They sound similar, get injected in roughly the same neighborhood, and both promise a more contoured jawline — which is exactly why people mix them up. In this article, we'll cover what each one actually targets, how to tell which cause fits your face, what the procedure looks like, and what it costs.
What Is Jaw Botox? What Is Parotid Gland Botox?
The short answer: jaw Botox relaxes a muscle, and parotid gland Botox calms down a gland. Same general area, completely different tissue.
Jaw Botox targets the masseter (the thick chewing muscle that runs along the side of your jaw). If you clench or grind your teeth, or you're a fan of tough, chewy foods, this muscle can bulk up over time — the same way any muscle grows with repeated use — and give your lower face a square, angular look.
Parotid gland Botox, on the other hand, targets the parotid gland (your largest salivary gland, tucked just below and in front of your ear). When it's overactive or simply larger than average, it can create a rounded fullness right where your jaw meets your ear — a different kind of "wide" than a bulky muscle.
| Treatment | Targets | Best For | Recovery Note |
|---|---|---|---|
| Jaw Botox (masseter) | Chewing muscle bulk | A hard bulge you can feel when you clench your teeth | Change unfolds gradually over several weeks |
| Parotid gland Botox | Salivary gland fullness | Roundness below the ear that's there even when relaxed | A mild dry-mouth sensation is possible early on |
Both injections rely on the same basic mechanism: botulinum toxin temporarily blocks the nerve signals that tell a muscle to contract or a gland to secrete. Nothing happens overnight — the effect builds gradually over one to a few weeks, whether it's easing muscle bulk or slowing gland activity.
How Do They Work, Anatomically?
Picture a cross-section of the lower face, right where the jaw meets the ear. The masseter sits close to the surface, running from the cheekbone down to the jawbone — it's what you feel bulge when you clench your teeth. The parotid gland sits just behind and slightly deeper, wrapped around the edge of the jaw, with facial nerve branches running directly through it.
That proximity matters. When Botox is injected into the masseter, the muscle gradually loses bulk as it's used less, and the jawline softens over several weeks. When it's injected into the parotid gland instead, the gland itself shrinks, easing the rounded fullness below the ear. Same toxin, same general region, two different targets — and two different results.
Which One Do You Actually Need?
Here's a quick self-check you can try in the mirror right now.
- Clench your teeth. If you feel a hard, defined bulge along the side of your jaw, that's likely masseter muscle — a sign jaw Botox could help.
- Relax your jaw completely. If the area just below your ear still looks or feels rounded and full, that's more consistent with the parotid gland.
- Notice both? Some people have a bulky masseter and an enlarged parotid gland at the same time, and a provider may recommend treating both areas.
That said, a mirror check is a starting point, not a diagnosis. It's easy to mistake gland fullness for muscle bulk, or the reverse — and if you assume it's muscle when it's actually the gland, you may not see much change after masseter Botox alone. Your provider can palpate, and when needed use ultrasound, to confirm which structure is driving the fullness before recommending a plan.
Botox isn't the right call for everyone. It's typically not recommended if you're pregnant or breastfeeding, if there's active infection or inflammation at the injection site, or if you have a neuromuscular condition or take medication that could interact with it. If any of that applies to you, talk to your provider about timing or alternatives before booking.
What Happens During the Procedure?
Because the masseter and the parotid gland sit so close together, precision matters more here than in a lot of other Botox treatments. Most providers walk through a similar sequence.
| Step | What Happens |
|---|---|
| Consultation & palpation | Your provider has you clench your teeth to map the masseter, then checks the relaxed jawline to assess the parotid area. |
| Ultrasound check | For parotid injections especially, ultrasound helps confirm the gland's depth and location relative to nearby vessels and nerves. |
| Dosing plan | Injection points and units are mapped separately for muscle versus gland, since the two respond to different doses. |
| Injection | A fine needle delivers the Botox at the planned depth and points — this part typically takes just a few minutes. |
| Follow-up | Results build over the following days to weeks, and your provider checks in before deciding on a next round. |
The parotid gland in particular sits near several blood vessels and facial nerve branches, so ultrasound guidance to confirm the gland's position and depth is generally considered the safer approach. Too much toxin, or an injection that's slightly off-target, can mean a weaker result or a noticeable difference between the two sides — which is why most providers favor a conservative dose and adjust from there rather than going in heavy on the first visit.
Side Effects & Risks
Jaw Botox and parotid gland Botox are both generally well-tolerated, but neither is free of trade-offs.
- Jaw Botox: Mild soreness or bruising at the injection sites, and — because the masseter also helps with chewing — some people notice slightly less bite strength with harder foods for the first few weeks.
- Parotid gland Botox: A temporary dry-mouth sensation is possible if the dose runs high, along with mild swelling or tenderness near the ear.
- Both treatments: Results build gradually, so don't expect an overnight change — and if the dose or placement is off, you may notice asymmetry between the two sides.
These effects are usually mild and settle on their own within a few days to a couple of weeks. If you notice spreading redness, fever, or pain that's getting worse instead of better, seek medical care right away rather than waiting it out.
How Much Does It Cost?
Pricing for jaw Botox and parotid gland Botox varies by clinic, by how many units are needed, and by whether one area or both are treated in the same visit — there's no single number that fits every case.
Rather than guess at a figure that may not match your situation, the most reliable way to get an accurate estimate is an in-person consultation, where your provider can map out units based on what they actually see and feel. If you'd like a starting point, current offers and package pricing are listed at /en/promotion.
The Bottom Line
Jaw Botox and parotid gland Botox both aim for a slimmer lower face, but they're solving two different problems: one relaxes a muscle, the other calms a gland. A hard bulge when you clench points to the masseter; a soft fullness that's there even when you're relaxed points to the parotid gland — and some people have a bit of both.
Like any procedure, both come with trade-offs — some soreness, a temporary dip in bite strength or a dry-mouth sensation, and results that build gradually rather than overnight. Individual results vary, and the effects of both fade over time, so upkeep is part of the plan if you want to maintain the look.
Ultimately, the choice depends on what's actually causing the fullness in your case, and that's easier to pin down with a hands-on exam than with a mirror alone. If you're considering jaw Botox or parotid gland Botox, a consultation is the best way to find out what fits you. BeautyStone is a dermatology clinic in Seoul's Hapjeong neighborhood — see current offers at /en/promotion.
Frequently Asked Questions
Q1. Do I need parotid gland Botox to get a slimmer jawline?
Not necessarily. It depends on what's actually causing the fullness. If your jaw feels hard and defined when you clench your teeth, that's usually the masseter muscle, and jaw Botox is the better fit. If the fullness is soft and stays even when your jaw is relaxed, especially just below the ear, that points to the parotid gland instead. Some people have a mix of both and end up treating both areas.
Q2. How long does parotid gland Botox last, and can it cause dry mouth?
Results typically last a few months before gradually fading, similar to other Botox treatments. A temporary dry-mouth sensation is possible if the dose runs on the higher side, along with mild swelling near the ear. Confirming the gland's depth with ultrasound and starting with a conservative dose helps keep side effects mild.
Q3. Should I get jaw Botox or parotid Botox first for a square jaw?
It comes down to what's driving the squareness. If the muscle along the side of your jaw feels prominent when you clench, jaw Botox is usually the first stop. If the fullness sits lower, near your ear, and doesn't change much with clenching, parotid gland Botox may be the better starting point. A quick clench-and-relax check in the mirror can point you in the right direction, but a hands-on exam is what actually confirms it.
Q4. Do I have to keep getting Botox forever once I start?
No — it's not a lifelong commitment. Botox's effects fade gradually over time, so if you stop treatments, your jawline or jaw-to-ear area will gradually return to how it looked before. Some people find the interval between sessions stretches out the longer they keep up with it, but there's no obligation to continue indefinitely.
