Root canal pain?

i am getting a root canal in a couple of hours on my left front tooth on the bottom.....will it hurt...i know that with this tooth there is only one root or soemthing compared to like bottom molars wich have 4
Update: it was abcsessed(no idea how to spell it you get the point) but i went on some really strong anti biotics to make all the pain in my jaw and stuff go away...after all that it all went away(including the pain in the tooth) but i still need the root canal
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