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Masseter (jaw) slimming injections

The masseters are the muscles found on either side of your face, above your jaw bone. If you clench and unclench your teeth, you should be able to feel them moving. Teeth clenching and grinding (bruxism) results in a build-up of the masseter muscles over time, making them large and bulky. This can result in headaches, pain around the jaw and ear, the wearing-down of the enamel of the teeth, as well as a wide, square jaw that many patients do not like.

Anti-wrinkle (neurotoxin) injections can be used to decrease the movement of the overactive masseter muscles, resulting in them weakening and shrinking over time. Anti-wrinkle injections work by blocking the message from the nerves to the muscles, resulting in less muscle contraction. In the case of the masseters, this means that patients experience less teeth clenching/ grinding, less headaches, and a slimmer jawline resulting in a more feminine and ‘V-shaped’ face. For patients who want the health benefits of masseter-slimming injections, but like the shape and size of their jaw, dermal fillers can be used to replace lost volume after masseter-slimming.

Masseter-slimming injections can be life-changing for patients that have experienced teeth grinding and the negative effects involved with this including headaches, jaw pain, and a loss of the enamel of the teeth.

Masseter-slimming treatment generally involves several treatments, especially if the masseter muscles are very large and over-active. Generally, after two to three initial treatments, a maintenance treatment will only be needed every 12 months.



Masseter-slimming injections procedure


Dr Alex will discuss your aesthetic goals with you to determine a personalised treatment plan.

The treatment area will be cleaned using alcohol and chlorhexidine. Happy gas is available to our patients to make them as comfortable as possible, but this is normally not needed for masseter-slimming injections as they are normally nearly painless. Dr Alex will inject the anti-wrinkle neurotoxin using a very fine needle into the masseter muscles on either side of the jaw. Gauze will be applied with pressure.

Dr Alex will continue to check-in with you during the procedure to ensure you are as comfortable as possible. Most patients report little or no discomfort or pain during the anti-wrinkle injections procedure.


Pain relief


We always provide pain relief to our patients. We use a combination numbing cream, local anaesthetic injections, and nitrous oxide gas (happy gas). The pain relief used depends on the treatment, the area being treated, and the patients’ individual needs and preferences. Your comfort will always be prioritised by Dr Alex. Most patients experience no or very little pain during the procedure. Masseter-slimming injections are considered much less painful than other injectable treatments, such as dermal fillers.




We advise our patients to avoid wearing makeup for 4 hours after treatment, avoid strenuous exercise on the day of treatment, do not massage or rub your face for 4 hours after treatment, and stay away from saunas, spas, and hot yoga for 48-hours post treatment.

In some cases bruising may occur around the treatment area, that can last up to one week. We provide our patients with a topical cream that is very effective in reducing bruising.

Masseter-slimming injections do not take effect immediately and it generally takes between 4-8 weeks to see the full effect. You will be reviewed by Dr Alex regularly over the course of your treatment to achieve an optimal end result.

In the event of any complications or concerns after the procedure, even after hours, Dr Alex will be available to discuss your concerns and provide advice, and offers a complimentary review if needed.




If you have any questions about masseter-slimming injections, please get in touch with us by email at info@facebydralex.com or by phone at 0466 898 839.