i think i have an abscess. I felt a bump in my mouth last night and touched it with a finger, and it POPPED! It was a blister with puss in it :( so I took a picture of the inside of my mouth and saw that my 2nd to last back molar is cracked. The only weird thing is I have no pain...so does that rule out abscess? Maybe it is nothing? The tooth crack worries me regardless so I am going to go to the dentist and have it looked at.