The sensitivity recently got so bad and painful that my whole
jaw was hurting on that side, and I had my first
root canal even though I am only in my twenties. This took care of the pain, but caused me to have to chew only on the left side for a while before and after the root canal. Now, as a result, I am starting to feel discomfort on the bottom left side, probably from the added stress of only chewing on that side.