I have an absesses and am getting a root canal. When my denist first opened up my tooth, i was in terrible awful pain and he says that i have the most painful tooth that hes ever dealt with. He says the tooth is dead, but its osmois thats the reason ive been feeling pain. He couldnt getting me numb when he first tried to open my tooth he couldnt get me numb and the needles hurt terribly. He recently opened my tooth up again and the needle didnt hurt as much and he was able to get me numb. I was in a little pain during it, but not near as much pain as the first time he opened my tooth up. Is there anything else my dentist can do so that im not in pain during the root canal when he finishes it. When will the bumb of the abcesses go away?