question: Hi,Four years ago, I had a root canal done on my 2nd upper molar on the left side of my mouth. For the past 2 years I have been having severe pains from the tooth and surrounding areas, it has become impossible to chew with that side of my mouth due to the pain. Also, there is a very bad smell coming from between the tooth and the surrounding teeth. I also have problems with my sinuses and it makes my breath smell bad.I've been to the dentist several times but not of the treatments seem to work. Please what could be the problem and can an extraction help?Thanks.