About 3 months ago I had a bad toothache (my left side back tooth) I went to the dentist because I.wanted them to pull it but they wanted to do a root canal and then cap it. I did not have the money for all of that so they gave me antibiotics and pain medicine. I finished the antibiotics and my tooth quit hurting so I never went back to the dentist. About 3 weeks later I got a knot right below my jaw line its about the size of a quarter and is very sensitive to touch. Is this an infection or something else?
Thanks for your query, I have gone through your query. The knot you are describing can be because of the tooth infection resulting in the formation of a cyst or osteomyelitis. So consult an oral physician and get a radiograph done to confirm the diagnosis. But get the tooth treated as early as possible. Once the infection is treated the lump or knot will automatically reduce. I hope my answer will help you, take care.