The best thing to do in a dental emergency is to contact your dentist, unless it is extremely severe, then you should go to the emergency room.Depending on the dental emergency you are experiencing, there may be some things you can do to help ease your pain and help the situation. Some efforts include: Dissolve a teaspoon of salt into a mug of warm water and use it as a mouthwash If your tooth is knocked out, place it in a glass of milk until you can see your dentist Try flossing to eliminate any gum pressure Use a cold compress on the swelling or painful area Swish with Hydrogen Peroxide to kill bacteria Take over-the-counter pain medication to alleviate pain