The instant my new crown was put on a left lower molar I experienced excruciating pain in my left jaw. In two weeks it has not gone away. But pain pills deaden it temporarily. The pain can start anywhere---a splitting headache, front teeth. cheeks, temples, earache, neck but once the tooth/jaw starts hurting these other pains go away spontaneously. It's a mystery. At times my whole head is involved in pain, but then it settles in the capped tooth in a minute or two. Pain pills can take from 5 min. to 30 min. to work. What is wrong? I had the tooth buffed some to better the bite but it didn't help the pain. Now the tooth above it is painful too and the gum is sore. I swish with peroxide daily in case of infection.