Can square jaw and face size be reduced with injections?

Yes, it is different. If the cause of a large-looking jaw is muscle development, botulinum toxin type A is suitable; if it is due to subcutaneous fat accumulation, contour injections that reduce fat are appropriate. Different causes require different procedures. When you clench your molars, if the side of your jaw becomes hard and bulging, it is closer to the muscle type; if it does not change much and feels soft to the touch, it is closer to the fat type.

In practice, mixed types with both components are common, and skin sagging may also be present. It is important to diagnose the proportion of causes through palpation and facial expression tests before deciding on the procedure. Rather than choosing a procedure based on self-diagnosis, it is recommended to first receive a professional diagnosis.

For mixed types, they are often received together. The two procedures act on different layers: botulinum toxin type A targets the muscle layer, while contour injections target the subcutaneous fat layer, so their roles do not overlap when combined. Addressing both muscle and fat simultaneously can result in a more balanced change in the jawline compared to doing only one.

Representative contour injections include V-Violet, Olyfit, and New Bee Joo, which use DCA/CA ingredients to destroy fat cells.

At Heal House, we replace square jaw botulinum toxin type A with a program called The L injection to compensate for potential side effects from long-term use, and we combine it with contour injections tailored to the amount of fat. However, whether to combine them, the interval, and the dosage vary greatly depending on facial shape and skin condition, so it is safe to decide after a diagnosis.

Square jaw botulinum toxin type A generally lasts 3 to 6 months initially, but with repeated treatments at regular intervals, the muscle has less chance to enlarge, and the slim jawline tends to be maintained.

On the other hand, fat cells reduced by contour injections are unlikely to increase again, but if body weight increases significantly, the remaining fat cells can enlarge, so weight management is also necessary. The duration of effect varies individually depending on muscle mass, habits, and metabolism.

Yes, they have a significant impact. Habits such as clenching teeth, grinding teeth during sleep, and enjoying chewy or hard foods continuously train the masseter muscle and are major causes of a square jaw. Even if the muscle is reduced through treatment, if the clenching habit remains, the duration of the effect may be shortened.

Conversely, square jaw botulinum toxin type A reduces the force of clenching itself, so it can help relieve discomfort from teeth grinding or jaw tension. It is advisable to form a habit of keeping your lips closed but slightly separating your upper and lower molars. If you have accompanying jaw pain or headaches, please mention them during the pre-treatment consultation so they can be reflected in the treatment plan. For accurate diagnosis and treatment planning, consultation with a dermatologist is recommended.