Teeth grinding, also called Bruxism, is unconscious clenching of the teeth, whether awake or asleep, which can lead to physical pain and dental problems. Chronic teeth grinding can also cause headaches, earaches, and facial pain, as well as chipping of the teeth and increased tooth sensitivity.
Teeth grinding can be caused by a variety of reasons, including stress, anxiety, and sleep problems, and can become exacerbated through the consumption of alcohol, caffeine, and recreational drugs, as well as prescription medication like SSRI (selective seratonin reuptake inhibitor).
The masseter muscle, used in chewing, when overexercised, can cause a wide or square-looking jaw. This can be a problem for women, who may feel that their face looks too masculine, and wish to have a more rounded, feminine look.