What Are Jaw Slimming Injections Done With?

The masseter muscles sit at the back of the cheeks and help close the jaw. Botulinum toxin type A temporarily reduces nerve signals to the targeted muscle, which can lessen its contraction. Over time, reduced muscle activity may make a broad or prominent lower face look narrower in suitable patients. The injection does not remove jawbone and is not the same as surgery or facial fat removal.

A clinician examines the jaw while you clench and plans injection points around the muscle. Temporary tenderness, bruising, headache, chewing fatigue, or changes in facial balance can occur. Read about [Botulinum Toxin Type A](/materials/botulinum-toxin-type-a/) for the material used.

Tell the injector about jaw pain, teeth grinding, swallowing problems, facial weakness, pregnancy, breastfeeding, neuromuscular conditions, and medicines or previous injections. Ask how the dose and placement will be tailored to your muscle size and facial structure. Follow aftercare instructions, avoid rubbing the injection sites, and attend review so any change in chewing strength or facial movement can be assessed.

Contact the clinic for worsening pain, marked swelling, infection signs, or new facial asymmetry that concerns you. Seek urgent medical help for trouble swallowing, speaking, breathing, widespread weakness, or an allergic reaction after treatment. New difficulty chewing that interferes with eating also deserves prompt review.

Ask whether your lower-face width is mainly related to masseter muscle activity, what change is realistic, and how chewing function will be protected. Clarify the product, injection sites, follow-up timing, and which previous medical conditions or medicines affect suitability.