Human: I've noticed that some of my teeth are chipping and breaking. What causes this? Assistant: 
This is a common problem among people who grind their teeth at night. It can be caused by a variety of factors, including stress, anxiety, and bruxism (grinding or clenching your teeth). To reduce the risk of tooth damage, try to relax before bedtime, avoid caffeine and nicotine, and use a mouth guard if necessary.