<s>[INST] I had a hard lump in my gums after a root canal and dentist said lets wait to see what happens and it does not hurt. It was hard and I decided to put salt on it and the bump actually crawled up into my gums and the bump was gone but now I just feel the lump in where the cheek and top part of your gums meet above my teeth. Any ideas what it is and what I can do for it? [/INST] Thanks for using Chat Doctor. Read your query. The swelling and the lump suggest that the abscess has not healed completely after the root canal treatment. It has to be excised or removed. I would suggest you to visit a good endodontist and have a radiograph done to see if the root canal treatment is done properly, if not retreat the tooth. You can also be advice to get a periapical surgery to remove the abscessed area depending upon how it is. Antibiotics like amoxicillin on prescription may be needful. Continue with salt water gargling. Hope this was useful. Thanks and regards. </s>