Bruxism is commonly associated with teeth grinding and clenching of jaw both during the day and at night. Bruxism leads to an overdeveloped masseter muscle due to constant clenching and grinding. This muscle tension can lead to teeth chipping, muscle spasms, headaches and neck tension. Cosmetically some clients complain of a square jaw appearance as the masseter muscles are so strong and bulky due to hyperactivity. While men can like this square appearance in a female one can desire a more slim, triangular shape.
Therefore some clients opt for masseter botulinum toxin for the slimming effect to the face. Other clients have botulinum toxin placed in the masseters to relieve the muscle pain.