Sleeping and biting on both sides of the tongue woke up with pain mainly due to bruxism, which is a kind of non-physiological dental contact. Molar disorder is a harmful non-physiological dental contact, its etiology is complex, the mechanism is not yet conclusive, mostly believed to be related to mental factors, neurological factors, occlusal factors, genetics and many other factors. The clinical manifestations of patients with bruxism are varied, mostly characterized by nighttime sleep grinding or involuntary grinding and clenching of teeth during the day. Daytime teeth grinding is usually caused by stress in life, and nighttime teeth grinding manifests as involuntary teeth grinding at night, which is often related to sleep awakening. Patients who grind their teeth involuntarily during sleep are at risk of waking up with pain by biting the sides of their tongue. For patients suffering from teeth grinding, may often appear to sleep and bite the tongue on both sides of the pain woke up, should regulate bad mood, reasonable release of pressure. If necessary, go to the local hospital for examination to clarify the cause of the disease, and choose the appropriate way to deal with it.