I work for a Dentist, and of the things that people are suggesting will relieve the Pain for a little bit, but will not take the pain away. Your best bet is to get them into see a Dentist. Pain can be the first sign of an infection, which is why you should get them to the Dentist. An infected tooth can be dangerous. If you can not get them to the dentist get them into their PCP or go to the local emergency room, especially if they are swollen or the have a bad or metalic taste in their mouth. If a tooth is infected it can cause your system to go septic and that is not good. Do not put off going to the dentist,, Hope this Helps!