If the pain is from an infection, putting a damp glob of Bentonite clay between the cheek and gum of the tooth in question will do wonders.
The clay will literally suck out the infection and you'll even smell it in the clay. I've used clay for EVERY infection in my mouth including abscesses and it works great.
Use a healthy soft moistened glob of clay and replace when you have to (maybe every 4-6 hours).
You can get Aztec Secret brand at most health stores or on amazon, or any other brand if you have it around. Wouldn't be without it.