Non-surgical jaw slimming relaxes the masseter — the muscle that powers clenching — to gradually soften a square or wide jaw over two to three sessions. Cost at DWL is from £300 per session, with results visible from two to four weeks and peaking around eight. It is reversible: stop treatment and the muscle returns to baseline. It is the conservative alternative to surgical jaw reduction, which needs general anaesthetic and weeks of recovery. Our masseter treatment is the non-surgical route we offer.
The thing the phrase "jaw slimming" gets wrong
"Slimming" makes it sound like fat — something you could diet, massage, or sweat away. For most people who feel their jaw is too wide or too square, that is not what they are looking at. They are looking at muscle.
The three things that make a jaw look wide
Bone
The mandible — the jawbone itself — sets the underlying shape. A genuinely broad bony jaw, the kind you can feel as hard angle under the skin, is structural. No injection changes bone. Only surgery does.
Muscle
The masseter is the thick chewing muscle at the back angle of the jaw. In people who clench, grind, or simply have naturally strong jaw muscles, it can become enlarged — what is called masseter hypertrophy. This is the single most common cause of a square, "boxy" lower face, and it is the one cause that non-surgical treatment addresses.
Fat
A fuller lower face from fat pads is a different problem again, and one a muscle treatment will not touch. If volume is the concern, jawline filler addresses a different cause.
How non-surgical jaw slimming works
The treatment uses small doses of a prescription muscle-relaxing medicine (botulinum toxin type A — the same class of medicine used in masseter treatment generally) placed into the body of the masseter.
Non-surgical vs surgical jaw reduction — at a glance
Surgery (mandibular angle reduction) does exist and does work, by physically removing bone. It is the right answer for a small number of people with genuinely broad bony jaws. This comparison of masseter treatment and jawline filler helps identify your cause.
Who is a good candidate?
Non-surgical jaw slimming suits you if your width comes from muscle. The signs we look for: a jaw that feels firm and bulges when you clench, a history of grinding or jaw tension, and an angle that softens in your own assessment when the muscle is relaxed.
The treatment course
First-round jaw slimming is usually a course, not a single visit. A typical plan is two to three sessions across the first six months.
Cost in London
At Dental & Wellness London, masseter treatment for jaw slimming starts from £300 per session. The dose and number of sessions are agreed with Dr Vishal Patel at consultation.
Results timeline
Nothing is visible immediately. The muscle begins to relax over the first one to two weeks, the first softening of the angle shows from two to four weeks, and the effect peaks around eight weeks as the muscle reduces in bulk. See masseter face slimming results for a realistic timeline.
What if you want your old jaw back?
This is the quiet reassurance that makes the non-surgical route easy to try. The effect is not permanent.
Frequently asked questions
Will my face actually look smaller?
If your width is muscle, yes — the angle softens as the masseter reduces, usually visibly by eight weeks and more so after a course.
How wide does my jaw need to be?
There is no threshold — it is about cause, not size.
Does it work for men?
Yes. Masseter enlargement is common in men, often alongside grinding, and the treatment softens the angle while keeping a masculine jaw shape.
Do I need this once, or ongoing?
First round is a course of two to three sessions, then maintenance roughly every five to six months.
How is it different from facial liposuction?
Liposuction removes fat. Jaw slimming relaxes muscle.
If you are weighing this up
The useful version of this decision starts with one question — is your jaw width bone, muscle, or fat?
