Can Botox Create a Thinner-looking Face?

I've heard that Botox can also be injected on the chewing muscles in the mouth to help to create a thinner-looking face. Is this true?

Doctor Answers 21

Great for relief of Migraines, as well!

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Injecting Botox into any muscle causes the muscle to stop working and shrink in size. We use this knowledge to make patients wrinkle-free.

Injecting Botox into the chewing muscle (masseter muscle) will cause it to get smaller and the lower face will appear thinner. It is not used to make a round or chubby face smaller, only for those with prominent masseter muscles that define the shape of their face.

The real use for injecting Botox into this muscle is to relieve muscle tension or migraine headaches. I am told that for those with uncontrollable headaches, that this has some benefit.

New York Plastic Surgeon
4.8 out of 5 stars 34 reviews

In a word, yes

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The masseter muscle, one of the chewing muscles, is sometimes enlarged causing a squaring of the facial shape. It occurs most often in those of Asian heritage and can be helped by Botox injections. Botox will cause some shrinkage of the muscle and narrow the jaw, creating a more angular and feminine facial shape. This effect can be further enhanced by filling the cheek bone area with facial fillers. For better or worse, the effects of Botox injections are temporary and non cumulative, meaning they will not add up if repeated several times. So, you would need to repeat the injections every 3-6 months to maintain the effect. Good luck!

Yes, Botox can assist in making the face appear thinner, especially with use of soft tissue fillers.

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Botox certainly can assist both directly and indirectly in making the face appear thinner.

Direct injection into one of the major muscles of the jaw that is used for chewing (mastication) has been reported to assist in making the lower third of the face appear thinner. However, an injection of this type is realized by the FDA as an “off-labeled use”; thus, it should be performed by someone experienced because of potential and unwanted adverse effects. I have injected this muscle a few times in my career, following dental procedures for the treament of muscle spasm. I will purposefully start with a small dose and work upwards. In general, I must warn you to be be careful.

A much safer route is to use Botox in conjunction with facial fillers and/or skin resurfacing. Botox has found a defined role in restoring facial harmony by removing unwanted lines and wrinkles in areas such as: between the head of the eyebrows (glabella), the forehead, and around the eyes (crow’s feet). Also, Botox can elevate the corners of the mouth and soften the vertical lines of the upper lip. Soft tissue filler injections can powerfully make the face appear thinner by adding volume to the cheeks, contouring the jaw line, and soften major and minor facial wrinkle lines, etc. A combination approach is the way to go!

I hope this information is helpful.

Stephen A. Goldstein, MD, FACS

Stephen A. Goldstein, MD
Englewood Plastic Surgeon

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Yes, Botox can be used on the masseter muscles

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It is possible to inject Botox into the masseter muscles to help thin the face. However, you should be sure that you are being injected by someone with extensive experience in Botox injection. It is not standard practice to use Botox in this way, but it can be done.

I hope this is helpful.

David Shafer, MD
Shafer Plastic Surgery
New York City

Botox in the masseters

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Yes there is a treatment where we inject wrinkle injections into the masseters muscle. This can indeed help create a thinner face. 

At Star cosmetic medicine, Jawline Slimming is charged at $9.90 per unit.

Depending on how strong your muscle movement is the average person needs 25-30 units in each side. The stronger your muscles are the more botox you will need.

Price is one factor, but of course it should not be the determining variable. The practitioners at Skin Deep are all very experienced and mentor other doctors in some of the more complex cosmetic procedures.

Slenderize Your Face With Botox

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By injecting Botox into the “chewing” muscles – otherwise known as the masseters – the muscles will relax enough that they look less bulky and the face appears more slender. These effects will vary depending on your anatomy. In cases where the masseter muscle is overdeveloped, the relaxing effect of Botox will make the jaw look softer and more feminine. Please consult a board-certified dermatologist who has expertise in slimming the jawline with Botox. 

Melda A. Isaac, MD
Washington DC Dermatologic Surgeon
5.0 out of 5 stars 6 reviews

Botox Can Thin the Face

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If your face is wide secondary to large muscles in the face, it can be made smaller by injections of Botox.  Botox is injected into the masseter muscles, which help in chewing, it can shrink them to create a slimmer face.  This will depend, however, on the patient's anatomy and whether he or she has an overdeveloped masseter that's causing the face to look wide or masculine. You'll need to be evaluated by a facial plastic surgeon to find out if you could benefit from this procedure. I hope this helps.

Botox to the MASSETER MUSCLE to thin the lower face

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Botox is used to shrink the master muscle and this can thin the face. This is a specialized treatment so use an expert injector.

Jeffrey M. Joseph, MD
Newport Beach Oculoplastic Surgeon
5.0 out of 5 stars 17 reviews

Botox can be used to soften prominent jaw

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Botox can be used to soften a square, prominent jawline in certain patients. If your prominent jaw is caused by large masseter muscles, then injecting Botox to weaken the muscle allows the jawline to become more tapered and feminine. Make sure to visit a board-certified dermatologist with experience performing this procedure for an in-person consultation because not everyone is a good candidate for this procedure. If you have sagging jowls, they will worsen if the masseter is treated.

Kimberly Butterwick, MD
San Diego Dermatologic Surgeon
4.9 out of 5 stars 20 reviews

Botox to thin the face

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Thank you for your question. Botox can be a very effective way to contour the jaw line by reducing the masseter shadow through the outer jaw skin. In addition, it can reduce symptoms of jaw clenching or grinding of teeth at night time. This is an advanced technique that requires a strong understanding of the underlying anatomy. Some side effects can results in some very unintented effects. This can include affecting the smile due to diffusion of the Botox into neighboring smile muscles. Over treatment can also overweaken your jaw muscles making it harder to chew food and causes your jaw muscles to relax too much when you sleep.
The injection technique does vary by physical exam and the goals of the treatment. Facial contouring goals may change the injection sites themselves to affect different portions of the masseter as well as the dose. The strength of the masseters can be felt by palpation and also helps me to determine dosing. In general, I start with 15- 25 units per side for most patients. If the have very strong masseters, then I may increase the dose, but more commonly ask them to return in three weeks for a touch up. Once you get the desired result, I let patients know that future treatments may require less to maintain the look or the jaw clenching symptoms, especially if they get treated as soon as they notice the symptoms return.

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.