The hazards of patients grinding their teeth in bed, including causing serious wear and tear of teeth, etc., damage to periodontal tissues, and impact on the temporomandibular joint, etc., as follows: a. Causing serious wear and tear of teeth: grinding teeth in bed, direct contact between upper and lower teeth, not only with great force, but also for a long time, easily causing wear and tear of tooth enamel, which may cause symptoms of sensitivity to cold, hot, sour, sweet and other stimuli, and can even occur Pulp necrosis. Second, the destruction of periodontal tissues: sleep grinding can cause gingivitis, periodontitis, etc., which can cause premature loosening and loss of teeth. Third, the impact on the temporomandibular joint: long-term sleep grinding can affect the function of the temporomandibular and even the bone quality. Fourth, facial pain, headache: most patients who sleep grinding their teeth can feel the fatigue of the jaw or headache after waking up. Fifth, cause mental burden: patients who sleep grinding their teeth for a long time will increase the psychological burden. Therefore, if you have sleep grinding symptoms, it is recommended to actively seek medical consultation and treatment, and usually pay attention to relaxation and release tension and unpleasant emotions.