I had a cavity filled (very large) about 2 1/2 years ago. My dentist said we need to keep an eye on it over the next couple of years. Well, it's giving me problems now. Looking at a tooth diagram, the tooth is a second molar. I would guess about 40% of the tooth is a big filling (maybe slightly less, but it's the biggest filling I've ever had). On the back side of the tooth below the gum line, a few months ago, a lesion or blister-like spot formed. I didn't really have any pain associated with the onset of the lesion. On occasion, after brushing my teeth, the lesion would subside (I assume I compromised the lesion as I would spit blood). It wouldn't take much for it to come back though. In the last few days I have a great deal of pain at the tooth. The tooth is noticeably loose too. At the onset of the pain a few days ago, I also had pain at the glands immediatetly below the tooth when I pressed under my chin. I have very little to no pain when I wake up in the morning (assuming I don't chew food on that side of my mouth). All that said, here's my question...unfortunately I can't currently afford to have a dentist fix this problem. Assuming I can endure the pain, what complications may I have if I choose to pull the tooth myself?