I had an abscess tooth i had extracted longer then a month ago. Before i had the tooth pulled it was infected and caused my jaw to hurt and i had a sinus infection spitting out yellow mucus. I had the tooth extracted and after the extraction blood and yellow mucus came out. I have still had bad sinus problems since i have had the abscess everytime i eat i spit out yellow mucus after eating. He said the tooth in front of the tooth extracted was in the same position as the other one but it don't hurt like the other one did. Can a tooth really cause all these sinus problems? They are upper teeth. I had an xray on the remaining teeth and they are not showing as abscess. I honestly do not know what's causing all this sinus drainage but it's has went on for 3 months. What is the best solution to do? Should i ask the doctor about antibiotics or what.