Can Botox in the Masseter Be Permanent and How Is This Muscle Different Than Others?

I had a botox injection into my masseter muscle a week ago, I heard that usually one only needs 2 botox injections to achieve a permanent dystrophy for this muscle. Can anyone please confirm if this is true and if so, how is the masseter muscle different to other muscles on the face in terms of its reaction to botox? Thanks

Doctor Answers 10

Botox in the masseters (for slimming the face and tension) is similar to all other muscles - lasts only 3-4 months

Botox is used in the masseter muscle for 2 reasons.  One is to reduce the tension in it that might be leading to headaches and TMJ.  The other is to decrease the hypertrophy in some people to make the profile a little thinner in that area.  I don't know where you got your infomation but the masseter behaves like all other muscles and the Botox results are only temporary.

Panama City Facial Plastic Surgeon
4.7 out of 5 stars 41 reviews

Botox for the masseter muscle

This is not true. The masseter muscle reacts to Botox in pretty much in the same way as any other muscle. Results last a few months but can last for up to a year depending on lifestyle habits. Touch-up injections may be required twice a year to maintain results.

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

Botox for enlarged cheeks - the masseter muscle

The masseter muscle is not different than other muscles and does not permanently atrophy. However, as it is used for chewing and clenching  can make it a larger mass of muscle from "exercise". Therefore it may take a larger number of units to relax this muscle than other muscles that are injected for cosmetic indications. As Dr. Andrew Blitzer, a NYC expert in using Botulinum toxin for TMJ and enlarged masseter muscles, says, the muscle  must be exercised to regain its girth, once it is no longer under Botox's effect.  The masseter muscle may take longer than smaller muscles to regain its size as the atrophy is dependent on the number of units of Botox injected. There is no knowledge of permanent atrophy of the masseter muscle.”

The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice.  The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs.

Ronald Shelton, MD
Manhattan Dermatologic Surgeon
4.9 out of 5 stars 37 reviews

Botox and facial coutouring

Botox injected into the masseter(s) muscles is not a permanent fix. It does weaken and atrophy the muscle, causing decreased size and a desirable facial contour for some. It requires follow up every 3 months or so (until you achieve desired results), then maintenance beyond that. Botox works the same on all facial muscles.

Sam Naficy, MD, FACS
Seattle Facial Plastic Surgeon
4.7 out of 5 stars 221 reviews

Botox, Dysport for masseter reduction

The masseter is a muscle of mastication, meaning it helps move your mandible (jaw) for chewing.  Compared to the mimetic (facial expression) muscles that are typically injected with neuromodulators, like the orbicularis, corrugator, procerus, and frontalis, the masseter is a far bulkier muscle.  Injections must be performed deep into the body of the muscle at multiple sites to be effective.  Just as in other areas, you will not achieve permanent dystrophy but rather see a gradual return of function over 3-5 months.  

Donald B. Yoo, MD
Beverly Hills Facial Plastic Surgeon
4.9 out of 5 stars 57 reviews

Botox (temporarily) slims the lower face and help with jaw tension/teeth grinding

Botox works well on the masseter muscles to slim the lower third of the face, and it also helps reduce teeth grinding/jaw clenching during the night.  

The effect of botox is the same for the masseter, as compared to any other.  Botox works by temporarily weakening the muscle.  The duration of the effect depends on how much is injected and how big the muscle is.

Melissa Chiang, MD, FAAD
Houston Dermatologic Surgeon
5.0 out of 5 stars 12 reviews

Botox for masseter muscles

It is true that after 2 sessions of Botox injected into the masseter muscles, the effect may last for a year or longer.  It is not known why the masseter muscles atrophy more than other muscles.

Martie Gidon, MD, FRCPC
Toronto Dermatologist
5.0 out of 5 stars 22 reviews

Botox and the masseters muscle

Over time there can be some atrophy or muscle weakening, just a bit, after many Botox injections. However, none of these would be considered permanent. If you stop getting Botox in any muscles, over time, that muscle will regain mobility and move again, just like it did before.

F. Victor Rueckl, MD
Las Vegas Dermatologist
4.6 out of 5 stars 17 reviews

Botox and the masseters muscle

Chronic Botox injection of the masseters muscle will cause atrophy and likely muscle weakening which may negatively impact mastication. Unlike other facial muscles for which Botox is used, the affects on the masseter may have functional results.

Edwin Ishoo, MD
Cambridge Facial Plastic Surgeon
4.4 out of 5 stars 20 reviews

Botox treatment of masseter (for facial slimming) is temporary

Botox treatment of masseter (for facial slimming) is temporary. Botox acts on this muscle in the same way that it acts on other facial muscles to reduce its activity. This has the effect of temporarily reducing the size of a hypertrophic masseter. It can be very effective but is not permanent. I hope this information is helpful.

Stephen Weber MD, FACS

Stephen Weber, MD, FACS
Denver Facial Plastic Surgeon
4.9 out of 5 stars 129 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.