A chipped tooth can happen fast from biting something hard, a fall, or grinding at night, and many chips are easy to treat if you act quickly. Rinse with warm water, avoid chewing on that side, and use a cold compress if there is swelling. If you find the broken piece, save it in milk or saline and bring it with you. Even without pain, a chip can expose the tooth and raise decay risk, so it is best to get it checked soon.