Rinse with warm water and a spoonful of sea salt. When the salt dissolves, gargle the water in your mouth, making sure it splashes around the affected area.
You can also try taking a painkiller such as Ibuprofen.
Apply a Cold Compress.
Fill a ziplock bag with ice, cover it with a thin cloth or paper towel, and apply it directly to the tooth or the cheek area just outside the tooth. The cold temperature will help ease the pain.
You could also try numbing the area with Orajel either the baby orajel or the adult version will work fine.
Sometimes toothaches are caused by small pieces of food that have gotten lodged in the tooth and are exacerbating the pain of cavities or gingivitis. When this is the case, thoroughly cleaning your mouth can go a long way toward eliminating the pain and making the problem go away.
Apply Some Clove Oil.
Clove Oil is a home remedy that is said to cure or at least ease the pain of a toothache until it goes away on its own. Rub a few drops on the affected tooth several times daily until the ache goes away. Clove oil can be found at most drug stores.
Clean The Affected Area With Hydrogen Peroxide.
This procedure will clean the area, and can help to ease the pain. Be sure to rinse your mouth with water, and absolutely refrain from swallowing the peroxide.