<s>[INST] I have had two 3- teeth bridges slide off recently; two back teeth that needed to be pulled; and a root canal . All of this happened within 2 months. Something is draining from what looks like under my teeth - usually it s slick and today it s foamy. It has a horrible putrid-sweet-sour taste and I haven t even eaten anything. Could it be some sort of bacteria under my teeth? [/INST] HI ROCKY, Thanks for posting your query. The foamy liquid is due to the abscess formed at the periapical area of involved tooth. The pus usually contains bacteria. I would suggest you get the tooth either root canal treated or extracted depending on the condition of tooth. Take complete course of antibiotics too. The sour taste will disappear once the pus Chat Doctor. Maintain good oral hygiene. Please get the treatment soon as it can lead into sinus infection if left untreated. Hope this helps. </s>