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.
Grinding can cause severe damage to your teeth and is one of the leading jaw pain causes. It is the process of clenching the teeth, that is not associated with chewing. Some people grind their teeth when they feel stressed, but a lot of people grind their teeth while sleeping, they just aren't aware of it.