A common reason for a toothache is a broken, fractured, or displaced tooth, but typically it is not an immediate reason to be alarmed, as long as you stay calm and act quick.
If someone has knocked out your tooth, the first thing you should do, after finding your tooth, is rinse out your mouth in order to remove any blood or foreign object fragments. Then, to reduce the swelling, you should put a cold compress on your cheek close to the effected area. Next, you should try to put it back in the empty socket, taking care to only hold the tooth by the crown, and not the root, so you don't damage it. If you are unable to put the tooth back in the empty socket, you should then take and put it in the victim's saliva, warm milk, or saline and keep it there until you are able to get in to see us.
If someone has caused your tooth to become fractured, you should rinse out your mouth, taking care not to swallow any tooth fragments, and put a cold compress on your cheek close to the effected area. To reduce swelling, you can also take ibuprofen, following the medicine's instructions. Once you are able to get in to see us, if the fracture is not major and the pulp is not severely injured, we will probably be able to fully restore it by sanding and bonding.
In cases where a child's primary tooth was loosened, whether the reason is that they were injured or because a permanent tooth is coming through and pushed it loose, you can try getting an apple or piece of caramel and having them gently bite down which should cause the tooth to come out of the child's gums.