Yes, you do need a mouth guard for teeth grinding. Teeth grinding, or bruxism is a disorder that can cause serious jaw and facial pain if left untreated. It is important to get professional advice when it comes to mouth guards for teeth grinding because there are different types of mouth guards available and each has its own advantages and disadvantages. Custom-fit nightguards provide the most protection from bruxism because they fit securely in your mouth and help prevent tooth wear caused by grinding throughout the night. Additionally, custom-fit “boil & bite” sports guards offer adequate protection while sleeping but may not be as effective during activities like intense sports that involve clenching of the teeth. Ultimately, a dentist or dental provider should be consulted in order to determine which type of mouth guard is best for you and your unique needs.