“How painful is a root canal procedure?”

Once you are anesthetized and nice and numb, there should be no pain, just pressure like getting your hair cut. Of course there can be exceptions, like if you ignore the tooth until it becomes so painful or sensitive or swollen, where you weren't sleeping at night due to pain, then it can be more difficult to numb up. A HOT TOOTH. Your endodontist (root canal specialist) can usually handle this. Good Luck.

In most instances with anesthetit is very comfortable