How to Slim a Square Jaw Without Surgery
3/27/2026
Do you have a square jaw and are feeling self-conscious about your appearance? Two options can help: Wrinkle relaxers, which relax the jaw muscles to create a softer appearance, and Ultherapy Prime, which tightens and lifts the skin for improved contours.
At My Aesthetics Intelligence in Dallas, TX, double board-certified nurse practitioner Annie Nguyen can help you understand how to slim your jawline without surgery. If you have questions or want to learn more about these treatments, call now to schedule a consultation.
What causes a square jaw?
A square jaw is often caused by overdeveloped masseter muscles, the muscles responsible for chewing. When these muscles are overworked from habits, like teeth grinding, clenching, or chewing gum, they become larger, creating a wider, angular appearance in the lower face.
Genetics also plays a role. Some people naturally have muscular jaws even without excessive grinding. While a strong jawline is desirable for some, others prefer a slimmer look. Fortunately, nonsurgical options, like masseter BOTOX® and Ultherapy Prime, can help.
Masseter BOTOX for jaw slimming
BOTOX is a treatment that relaxes the masseter muscles to reduce their size over time. It works by blocking the signals between nerves and muscles. Other wrinkle relaxer options include Dysport® and XEOMIN®.
Our BOTOX procedure is quick, typically taking about 10 – 15 minutes. Annie will inject the wrinkle relaxer into multiple points along the masseter muscle on each side of your jaw. You may feel a slight pinch, but the process is considered very tolerable.
Results develop over 2 – 6 weeks as the muscles respond to the treatment. The effect lasts about 4 – 6 months, at which point maintenance sessions can be scheduled.
What is Ultherapy Prime?
So, what is Ultherapy Prime? This treatment uses ultrasound energy to tighten and lift the skin. It also targets deeper layers of tissue without much downtime, making it popular for improving jawline definition and reducing sagging.
Ultherapy Prime takes 60 – 90 minutes, depending on the areas being treated. You may feel warmth or a tingling sensation during the process. Results develop over 2 – 3 months and can last up to a year or longer.
Combining treatments for optimal results
For patients with both overdeveloped muscles and skin laxity, combining wrinkle relaxers with Ultherapy Prime delivers one of the most comprehensive results. BOTOX slims the muscles, while Ultherapy Prime tightens the skin.
During a consultation at My Aesthetics Intelligence in Dallas, TX, Annie will evaluate your jaw structure and discuss your cosmetic goals to determine the ideal approach. She'll create a personalized treatment plan that addresses your specific concerns.
Healing and results
Both masseter BOTOX and Ultherapy Prime require minimal downtime. After your BOTOX procedure, you can return to normal activities almost immediately, though you should avoid exercise and lying flat for a few hours.
After Ultherapy Prime, you may experience mild redness or swelling for a day or two. This typically resolves quickly, and you can resume your regular routine right away.
Results from both treatments develop gradually, so changes are noticeable but natural-looking. Your jawline can appear slimmer and better defined without looking obviously altered.
Learn how to slim your jawline without surgery
So, what is Ultherapy Prime, and how does a BOTOX procedure work? If you have a square jaw and want to know how to slim your jawline, My Aesthetics Intelligence in Dallas, TX is here to help. Double board-certified nurse practitioner Annie Nguyen specializes in wrinkle relaxers and Ultherapy Prime for jawline contouring. Call today to schedule your consultation and learn more.