To help a tooth abcess go away FAST, use oregano oil.
All that it takes is 2-3 drops placed under your tongue every couple of hours. It burns for a few minutes(Do Not get on your skin) but the results are definetely worth it! It kills the bacteria that causes the abcess and also kills viruses as well. You can find out more by searching for oregano oil. You can buy it at most health food stores or over the internet.