Botox is commonly used to decrease the bulk of the masseter muscle which is the muscle that bulges when you clench your jaws. This gives the appearance of a more slender jawline.
Yes, Botox can be used to slim the face! This is done by treating the masseter muscles with Botox or Dysport. Your masseter muscles are thick rectangular muscles in the jaw, which are responsible for jaw clenching and teeth grinding. Injecting Botox or Dysport into these muscles relaxes and weakens them. Decreasing the use of these muscles leads to muscle atrophy (shrinkage in size) which is what provides the facial slimming effect. This treatment can improve facial shape, giving the face more of a "v" line shape.I've created a video where I review slimming the face with Botox/Dysport. I hope you find this helpful in your research!