It accumulates negative ions in the atmosphere to blast out 10000- volt lightning bolts.
Teeth grinding is harmful for several reasons. First, it causes damage to the teeth by wearing the enamel off the biting surface of the tooth and along the gumline. This can lead to tooth sensitivity. Second, the forces generated from grinding can cause cracks to form in the teeth and can cause the teeth to break.
Chronic, untreated teeth grinding, or bruxism, is not life-threatening, but it can be harmful to the teeth, jaw and surrounding muscles. People with severe bruxism can break dental fillings, chip, crack, or damage their teeth.