<s>[INST] i went to the dentist about 2 days ago, and they started a root canal in one of my bottom teeth . so i think they just drilled the hole to the release the pressure. since then the pain that i have been having in that tooth has now spread to several of my bottom teeth. i need help, i cant sleep at night because of the pain. [/INST] Dear friend since your root canal has started two days back I can understand that it is quite painful till the time your tooth is under anesthetic effect it does not pain that much, but once the effect of local anesthesia wears off you start feeling pain which gradually increases. For that, you can request your dentist to give you painkiller, eg (Coquitlam, just before the effect of anesthesia wears off, i e once your dental seating gets over immediately take the painkiller. And you can continue this for every six hourly for another two to three days till your canal preparation is completed after that I am sure you will not have any pain in that particular tooth and the adjacent teeth. A single nerve supplies to most of the tooth in lower jaw so you are feeling this pain in several teeth, but need not worry once your root canal is done you will not have this problem. I hope your dentist would have prescribed you antibiotic and painkiller. If not, you can request your dentist for a course of antibiotic and painkiller for three days. Thank you </s>