Hi.. Can understand your concern.. As per your complain pain in a root canal treated tooth is due to infection below the root tips of the tooth.. When the infection is mild there is some amount of pain and the body s immunity plays its role to wall off the infection and cure.. When the infection increases there is Abscess formation below the root tips of tooth and when there is no escape way for pus it creates pressure on the nerve fibres in the region and causes pain.. Pain rising during lying done to sleep indicates that there is pus formation which causes more pressure while lying done causing increased pain Headache can be due to radiating pain from tooth and to cure it treatment of tooth has to be done.. I would suggest you to consult a dentist and get an x ray done to check for the level of infection.. In case if there is abscess formation a 10 days course of antibiotics like Augmentin 625mg twice daily and painkiller like Ibuprofen twice daily along with Pantoprazole 40mg empty stomach in morning can relieve.. But in case if there is no relief and the symptoms of pain aggravates or swelling occurs you need to get the root canal treated repeated or the tooth needs to be extracted.. Hope this information helps.. If you find the answer helpful please write a positive review and click on found this answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora..