Why do people grind their teeth?

Bruxism, medically referred to as "nocturnal bruxism," can be caused by various factors. Psychological stress and anxiety are common contributors, as they may lead to involuntary muscle tension, including in the masticatory muscles. Malocclusion or misaligned teeth also may contribute to bruxism, as the body attempts to adjust the occlusal relationship. Certain medication side effects, sleep disorders such as sleep apnea, and genetic factors may also be associated with bruxism. Deficiencies in certain nutrients in the body, such as minerals like calcium and phosphorus or vitamins like vitamin D, may affect normal tooth and masticatory muscle function, thus triggering bruxism.

In daily life, patients can try some relief measures, such as practicing relaxation techniques, reducing stress, and avoiding caffeinated or alcoholic beverages, which can improve sleep quality. If bruxism is severe, an oral appliance may be needed, which can be worn during sleep to protect the teeth from further wear. If symptoms persist or cause tooth pain, timely medical consultation is advised.