Botox to Contour Jawline?

Approximately, how many units of Botox are necessary to contour thejawline? I've called a few plastic surgeons & have gotten different responses.

One doctor said it would take approximately 10-15 units per one side of the jawline & regular follow ups would be necessary to upkeep the look every 4 months or so.

Another doctor said it would take a whole box or 50 units per one side of the jawline & just one more follow up session in 6 months to upkeep the look because it would permanently weaken the jawline muscle.

So, which route will lead me to the best results of having a contoured mandible? How many Botox units are needed to make my face appear smaller? Also, what is the appropriate Botox follow-ups? Thank you!

Doctor Answers 18

Jawline Botox depends on masseter muscle size

Dear Shery,

Jaw line Botox is injected into the Masseter muscle, which is used to close the mouth and chew. The technique is probably most popular in the Asian community. A bulky masseter muscle makes the lower face look full and heavy. Just a small amount of Botox in this muscle on both sides will cause loss of mass in this muscle and help improve the shape of the lower face. The dose used should not be so great that it interferes with the actual function of the muscle.

One can always do more Botox. Over doing it with too much can lead to a very unpleasant several month interlude waiting for excessive treatment to wear off. Therefore, it is much better to be safe and do less. I typically start with 8 units of Botox per side. I treat the masseter muscle where it inserts into the Jaw bone. A big part of the treatment results comes from muscle atrophy. So treatment effects should not be judged until about a month after treatment. The effects last a little longer than forehead Botox as the jaw line volume takes time to return. 4 to 5 months is realistic before retreatment.

Beverly Hills Oculoplastic Surgeon
4.9 out of 5 stars 26 reviews

It depends on your masseter muscles

Botox for the masseter achieves temporary results that last a few months. The exact dosing for your masseter reduction can be determined in consultation with your cosmetic physician, as it is important to see how strong your muscles are with an in-person evaluation. However, to give you an idea, you may require approximately 30 units of Botox per side. Multiply 30 with the average cost of a Botox unit, which would range from $300-$400.

Jerome Edelstein, MD
Toronto Plastic Surgeon
5.0 out of 5 stars 176 reviews

No significant jawline definition from Botox


I reiterate one of my colleagues' statements that you should not expect much jawline definition from Botox treatments. Loss of jawline definition in the aging process is not caused by muscle pull. It is caused by gravity's effect on the soft tissues of your cheeks (jowling) and neck. Regardless, the effects of Botox are never permanent, so avoid door number 2. Good luck!

Kenneth R. Francis, MD, FACS
Manhattan Plastic Surgeon
4.6 out of 5 stars 47 reviews

Masseter Botox injections

Depending on the physical exam, I normally use 15 - 35 units of Botox on each side.   It is easy to add more if the desired result is not achieved.  In addition, I tend to use weaker doses when patients return because they start to see the effects wear off.

Young R. Cho, MD, PhD
Houston Plastic Surgeon
4.8 out of 5 stars 37 reviews

Botox to contour the jawline

The jawline is composed of 3 separate tissues: skin, muscle, and fat. Botox will have no effect on the skin or fat in the jawline which would require a facelift or neck lift. Botox can be injected into the platysma muscle when there are bands present in the front portion of the neck, but the amount of Botox it takes can be quite cost prohibitive. Since the platysma muscle is also quite wide it will take a significant amount of Botox to help the lines go away and it will not last very long.  In our practice, the best uses for Botox are the corrugator lines between the eyebrows, the horizontal lines of the forehead, and  the crows feet.

William Portuese, MD
Seattle Facial Plastic Surgeon
4.8 out of 5 stars 143 reviews

Botox to contour jawline

The amount of Botox into the masseuse muscle depends on how bulky the muscle is. 20-50 units per side is possible. Make sure you are properly examined by a physician who has experience with massager injections. Sincerely, Martin Jugenburg, MD

Martin Jugenburg, MD
Toronto Plastic Surgeon
4.9 out of 5 stars 457 reviews

Everyone is different


Everyone is different, so everyone requires different amounts of Botox. Without examining you or seeing pictures, it is hard for us to give you any advice. One thing I can tell you is that you should not expect miracles for jawline definition with Botox. Good luck.

David Shafer, MD
New York Plastic Surgeon
4.9 out of 5 stars 75 reviews

Botox Units Needed to Slim Jawline Varies by Patient

When slimming the jawline, Botox is injected into the masseter muscle to relax it. How much Botox you need will depend on how developed that muscle is. However, if you are expecting the jaw to be more contoured or lifted, I reiterate my colleague's remarks that Botox will not do that. It can only make a heavy jawline look less bulky. As for follow-up treatments, Botox generally wears off within three to six months – no matter how much is injected. In patients that need narrowling or shrinking of large masseters muscles, i will use 50 units of Botox.  You need an in-person consult to determine what's best for you and how much it will cost. I hope this helps.

Jonathan Kulbersh, MD
Charlotte Facial Plastic Surgeon
5.0 out of 5 stars 66 reviews

Botox to slim and contour the jawline

Botox can be used to contour and slim the jawline on many clients. The amount of units needed depends on the size and strength of your masseter (jaw) muscle. On average we are using 30 units per side for this treatment.

Justin Harper, MD
Columbus Physician
5.0 out of 5 stars 19 reviews

Botox to Contour Jawline

Reducing the bulk of the Masseter muscle helps to change the shape of the face from a square on to a round one. Typically 20-25 units per side is what is commonly done

Naveen Somia, MBBS, PhD, FRACS
Sydney Plastic Surgeon
5.0 out of 5 stars 73 reviews

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.