<s>[INST] I have a cankersore with dark centre near my wisdom teeth in the back and that area is hurting. My gum overall is quite swollen. Any remedies or why i get them? I always get canker sores and they just seem to keep coming back after every few months or so. Whenever i bite myself by accidentet they tend to become canker sores and takes weeks to heal.  Will I get complications when having wisdom teeths pulled? [/INST] Hi. Thanks for the query. As per the symptoms it looks like it is not a Canker sore but is appearing to be inflammation of the gum around the wisdom tooth leading to Peritonitis. The sore can be an abscess secondary to pus formation caused due to infection. I would suggest you to consult an Oral Surgeon and get evaluated. An x-ray of the wisdom tooth will be advised. In case of Peritonitis first you will be given a course of antibiotics like Augmenting and anti-inflammatory painkillers like Ibuprofen along with doing warm saline gargles and antiseptic mouthwash gargle. Once the pain and swelling reduce then if the wisdom tooth is impacted then it can be removed without any problems and would not cause any complications. In case if the wisdom tooth is not impacted then it is not necessary to get it extracted but if there are recurring episodes of swollen gums or Pericoronitits then surgical removal of gum flap can help. Hope this helps. Regards. </s>