your doubt is partially right. the root canal treated tooth might get some entrapped bacteria which causes you pain. it cannot be straight away told that the nerve was not completely removed. there are some reasons for postoperative pain. improper shaping of the canal which clogs debris and bugs. improper disinfection of the root canals. high occlusion. you have to get your next dental appointment as soon as possible where your high occlusion will be corrected or the root filling is removed and medication (dressing) is placed inside the canals for two to three weeks to ensure the infection is gone down. after that proceeding with a permanent root filling and crowning the tooth with a ceramic cap would be better. for immediate pain relief please take the painkiller as already prescribed by your doctor. for further information consult a dentist online --> <link>
i am feeling pain after root canal treatment. why?