In an article published by Natural News, this is how Tony Isaacs recommends using black seed oil to fight a toothache.
Sunday, March 18, 2012 by: Tony Isaacs
Take one teaspoon of blackseed oil (Nigella sativa) and 1/2 cup of vinegar and boil. Cool and then use as a mouth rinse to reduce inflammation and infection. Rinse every couple of hours until the pain and/or swelling is gone.