Masseter botox, typically used for jawline aesthetics, is a cosmetic procedure where botulinum toxin is injected into the masseter muscle. This muscle controls jaw movements and can sometimes become overactive, leading to the prominence of jawline. Botulinum toxin helps reduce the activity of this muscle temporarily, thereby assisting in slimming down the jawline. 

Masseter botox is often employed to soften the jawline, achieve a slimmer profile along the jaw, or alleviate jaw-related issues like bruxism (teeth grinding or clenching). The procedure involves injecting botulinum toxin (Botox) directly into the masseter muscle, which is situated on the side of the jaw and responsible for chewing function. 

Botulinum toxin temporarily reduces the activity of the masseter muscle, diminishing its size and strength. This can result in a softer and less pronounced jawline. Additionally, botulinum toxin may alleviate bruxism symptoms by reducing the excessive activity of the jaw muscles. 

The procedure usually takes a few minutes and is generally painless. However, some mild side effects may occur post-treatment, including slight pain, temporary swelling, or bruising at the injection site. Results typically become noticeable within a few days and last between 3 to 6 months, with the option for reapplication. 

Nevertheless, it’s important to consult with a doctor before undergoing procedures like masseter botox. A doctor can determine the most suitable treatment options based on individual needs and medical history.