Ask most people where Botox goes and they point at the forehead. Frown lines, crow’s feet, the eleven between the brows. Fine.
My favorite spot is lower, and it has nothing to do with wrinkles. The masseter, the chewing muscle anchored at the angle of the jaw. When that muscle is strong, it widens and squares the lower face. Relax it and the jaw narrows, softens, reads more feminine. No incision. No downtime. Nothing for anyone to notice but the result.
For the right person, it is a small treatment that quietly reshapes the whole face.
What Masseter Botox Actually Does
It relaxes the big chewing muscle along the back of your jaw. Overdevelop that muscle, usually from clenching or grinding, and it bulks the lower face out wide and square.
Soften it, and over the following weeks the jaw draws in, so the face reads more oval and more feminine. You get that tapered lower third, and nobody can tell you had a thing done. That is the part I love. A surgeon-level result delivered through a needle.
Why It Lasts Longer Than Forehead Botox
The masseter behaves differently from regular Botox, and that surprises people.
Treat the forehead or the eyes and you get about three to four months. The masseter holds far longer, usually around six, because of how that muscle responds to being relaxed. So you are not chasing it as often. We treat it, you enjoy it for half a year, then we touch it up.
| Area | Typical Duration |
|---|---|
| Forehead, glabella, crow’s feet | About three to four months |
| Masseter (jaw) | Around six months |
How I Decide the Dose
It rides on the strength of your muscle. First time, if the masseter is strong, I may treat it more fully, an even split across both sides. Once a prior round has already softened it, we back off, because now we are maintaining rather than starting cold.
What I am after is a balanced, even result so the jaw narrows symmetrically. I would rather build the effect gradually than overdo it in one sitting. You can always add more. Subtracting is the hard part.
Can It Feminize the Face?
Yes, and this is one of the things I love most about it. Narrowing the jaw does a lot of the work in softening a masculine or very square lower face. Bring the angle of the jaw in and the face turns more heart-shaped, more feminine, and it does it in a way that reads natural rather than surgical. People notice you look better. They do not notice why.
Where the Chin Comes In
The chin works in concert with the jaw. Sometimes, once we have narrowed the sides, a little projection in the middle of the chin finishes the look, keeping it pointed and feminine instead of wide. That can start as a small amount of filler.
For something permanent, I reach for a button-style chin implant. A button projects the chin straight forward rather than widening it, so the chin reads narrower and you get that clean shadow underneath the jawline everyone is after. Filler previews the look first. If you want it to last, the implant is the better long-term tool. The two pair naturally with masseter Botox. Relax the jaw to draw the sides in, add projection out front, and the whole lower face settles into balance. I think about the lower face the same way I think about a facelift, as one connected unit rather than a set of separate parts.
The Credential Behind the Approach
I am double board-certified by the American Board of Plastic Surgery and the American Board of Surgery, a Mayo Clinic plastic surgery fellowship alum, and a Castle Connolly Top Doctor for thirteen consecutive years. I treat the lower face as one connected unit, the masseter, the jawline, and the chin together. A few units of Botox in the right muscle, sometimes paired with a little chin work, can reshape a face more than people expect. Done well, it looks like you, just more refined. The in-office injectable side of all this lives at our Med Spa.
Ready to Talk?
If your jaw has always looked wider or squarer than you would like, masseter Botox may be the simplest fix, no surgery required.
For the patient-facing version, see the companion post on agulloplasticsurgery.com. For the El Paso treatment menu, see the version on swplasticsurgery.com.
Call (915) 590-7900, text 1-866-814-0038, or book online at agulloplasticsurgery.com. #StayBeautiful.
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