Mouth guards are design to protect your teeth from breaking and the soft tissues surrounding them from lacerating (lips, cheeks and tongue) when possibly receiving trauma while doing sports.
If you are actively doing sports talk to your dentist about getting a custom fitted guard.
All the information on this website is design and meant for the education of the patient. Your Doctor will always have to do an exam to evaluate and diagnose your problems and needs. It is not for self diagnostic.