<human>: Hi, I recently noticed a soft lump just beside a tooth on which I had a root canal performed years back. The lump is not painful but I noticed that sometimes the swelling reduces and blood comes out. The next day it swells again. I noticed some small puss right on the top of it too.
<bot>: Thanks for using Chat Doctor. Read your query. The signs and symptoms you have presented suggests reinfection in the root canal treated tooth. I would advise you to visit your Endodontist and get an X-ray done to evaluate the status of the abscess. Go ahead with the re-treatment of the tooth if there are favorable conditions. Antibiotics may be required with prescription from the dentist. Do salt water gargling. Hope this was useful. Thanks and regards.