Toothache can be quite a characteristic of an actual problem with teeth, gums or jaw. Normally you will have a small hole, or some decay in a very tooth which includes become sensitive. You may also have infected/inflamed gums or teeth. There are range of other reasons for toothache including pain referred from sinuses as well as simple as food stuck between teeth.
Salt-water
But if your toothache pain is mild, rinsing your mouth with warm, salty water might help. This is recommended after the meal for those who experience pain
Floss
If you think you've got food stuck between painful teeth try gently flossing the spot in order to dislodge their food.

Ice
Applying ice for the involved area may numb your teeth and so provide toothache relief. Try to arrange the ice across the teeth and hold it there a couple of minutes.
Activated charcoal
Mix two teaspoons of activated charcoal powder with only enough water to manufacture a paste. Connect with bit of gauze make about the tooth and bite down. Activated charcoal can be obtained at many pharmacies and natural nutrition store.
No matter what way you will adopt, the ways that I have talked on the above  just can help you relieve the pain temporarily, if you want to be far away from the annoying thing forever, I suggest you to see a dentist. If you are not so rich, you also can buy some dental equipment from Alandental for yourself to clean your teeth at home.