When you have a toothache, take some ice cubes from the freezer, put them in a bag and massage your hand. It may sound strange this trick works in Chinese medicine. But there are some things you should keep in mind.
First of all the hand must match affected part (left or right) and there is a specific point which must be massaged: press with your thumb and index finger the muscle you feel strained (in the V zone between fingers). Massage the point that Chinese call it hoku for 7 minutes and the pain will disappear.
This trick is temporary, so you should see a dentist.