Castor oil is the best oil ever. I personally have used it for an abscess in my teeth, more than once. I cured an infection in my jaw bone from the abscessed tooth. This was examined by a dentist who wanted to pull the tooth. I did not want the tooth pulled so I used castor oil on my gums and on the tooth. It cured the infection and took the pain away within an hour. I still have the tooth many years later.