When the masseter muscle, located on the side of the jaw area and known as the strongest chewing muscle, grows and becomes visible even from the outside, it is called masseter hypertrophy (masseter enlargement). The most common reasons for this situation are that people may clench their teeth without being aware of it, especially during periods of intense stress. In addition to clenching and grinding teeth for various reasons, it also includes chewing too much gum and consuming hard meat frequently. The habit of clenching teeth leads to growth in facial and chewing muscles. This situation is also quite harmful in terms of the aesthetic appearance of the face. Because the appearance of the face is distorted. Thanks to the chin botox application developed as a solution to this situation, the square face shape is reduced, providing a more masculine and tough appearance. Thus, a more proportional face shape emerges. Excessive growth of the masseter muscle may cause both aesthetic and physical discomfort. Therefore, this procedure, also known as clenching botox, is sometimes applied for both shape and functional treatment purposes.