Facial slimming is a cosmetic treatment that uses injections of anti-wrinkle agents to reduce the appearance of a wide or square jawline. The injections work by temporarily relaxing the masseter muscles, which are the muscles responsible for chewing and clenching. By reducing the bulk of the masseter muscles, facial slimming can create a more refined and contoured jawline. The treatment is quick, minimally painful, and requires no downtime. Results can be seen within several days, with optimal results typically lasting several months. Facial slimming is a non-invasive alternative to more aggressive jawline reduction procedures, such as surgery.