My boyfriend has been suffering from a toothache for about a week. He had this same toothache a month or two ago, but it went away. This time, it has not gone away and nothing is working to alleviate the pain. He went to the dentist and, while their x-rays revealed a number of cavities elsewhere, none of them were near the tooth in question (this particular tooth has had a root canal before, but no crown, and has since cracked). They also found one of his top wosdom teeth has a huge cavity (but it is a bottom tooth that is hurting). My boyfriend does not have dental insurance and we can't afford to pay for extensive dental work. We've received no guidance or suggestion on what's causing the pain or even any recommendations on whether fixing any of the above stated problems would help. The dentist did prescribe a mouth wash(Chlorohexadine something-or-other) but again, nothing is helping with the pain and I don't know what else to do.