<s>[INST] Hello ...I had a tooth canal treatment last year. A month ago it started hurting me , went to dentist care ,had X-ray and Dr said I had an infection .got some antibiotic .After finishing antibiotics , things went good for a week or so than pains started all over . Saw other doctor who gave me penicillin and flagyl. She will extract it next week .Now my jaw looks swollen as if I have ping pong ball in my tooth .is that normal ? [/INST] Hi. Welcome to Chat Doctor . I have gone through your query and can understand your concerns. As per your complaint it seems that due to infection in the root canal treated tooth there is pus formation below the root tips of the tooth forming a DENTAL ABSCESS which at times perforates the bone and gets accumulated in the soft tissues leading to appearance as a swelling. The swelling that you are experiencing is not a normal occurrence and is due to dental abscess formation. You should immediately get the tooth extracted, and the pus will get Chat Doctor. . It should be taken care of as if not treated on time can lead to Cellulitis and Facial space infections. Hope this information helps. If you find the answer helpful please give me a Five-Star Review and click on found the answer helpful as a token of appreciation. Thanks and regards. </s>