<s>[INST] Pain, swollen gums and feels like a blister in space where right bottom molar was (extracted 9 years ago). The molar above has dropped down into the open space since then, but with the swelling below it prevents me from closing my jaw completely due to pain. Never has wisdom teeth form except for top right one and its impacted and still intact (also no issues or pain with this). There is no tooth on the bottom to cause this. The blister is on the inside of the gum and the tongue moving causes discomfort. No pain on top and it is difficult to eat. Is it more likely an abscess or something that could be resolved with a peroxide gargle/rinse? [/INST] Hello and welcome, Usually after extracting any tooth,it has to be replaced with artificial teeth to prevent drifting of adjacent/opposing teeth. The opponent upper molar has supra-erupted due to this. Please  get a scaling done. Cureetage and drainage of abscess if present has to be done. Also check for adjacent teeth which are decayed/periodontally compromised. oNce the swelling subsides,get the missing teeth replaced. Hope this helps. </s>