<s>[INST] I have had my wisdon teeth removed since i was about 17 years old, beings they would have pushed into my back teeth, & because i have overly crowded teeth! Now my back right tooth has a whole right above the tooth at the gumline which is draining pus constantly, and no matter how many times a day i brush my teeth, my mouth has a foul taste! Does anyone know what this could be?? [/INST] hiwelcome to HCMFoul taste or helitosis could be because of pus discharge from the teeth.for this you need to get IOPA xray done which will reveal the cause of pus discharge.this pus discharge might be because of underlying infection inside gums or abscess formation.visit your dentist and according to xray finding, get your treatment done.thank you </s>