I have had a tooth infection and a root canal. The infection returned days after the root canal and continued to hurt, but then I had a Uti with an sulpha antibiotic prescribed for 10 days. I also had two rounds of amoxicillin prescriptions for the tooth infection.the endodontist said the tooth infection has been around for years. i have had extreme abdominal and intestinal gas and nausea for 17 months that went away after the sulpha antibiotic but has now returned very strongly.my question is: can a tooth infection  cause gas, nausea, and occasional purging like vomiting, or is chronic uti infection the main cause ? the tooth hurts when not on antibiotics.
Hello, Well, the symptoms of gas, nausea and purging are not due to tooth infection, however can be due to stomach related problem. So, you should once get yourself examined by a Gastroenterologist. As far as tooth infection post root canal treatment is concerned, and then taking antibiotics can suppress the infection and not resolve it completely. However, for complete resolution you should get the tooth treated again with root canal treatment so that the infection is completely resolved, and the pain will permanently subside. So, consult an Endodontist and get yourself evaluated. Hope I have answered your query. Let me know if I can assist you further.