I have been having a mild but constant toothache for past two months on the right end mostly the wisdom tooth. There is no pain while chewing or touching. But the pain extends from under the jawline to the ear. Sometimes the pain is unbearable and otherwise it is mild and constant. The pain starts and increases while I lie down and during sleep. And subsides if I sit. What could be the he reason and how can I get an instant relief for the sudden pain as I won't be able to go to the dentist anytime soon.