After filling the tooth still hurts may be the tooth tooth sensitivity or the emergence of irreducible pulpitis, may also be other tooth pain. 1. Tooth sensitivity: when tooth decay is too deep, need to use instruments to remove decayed tooth tissue in order to fill, in the process of operation instruments or filling materials may cause a certain degree of irritation to the pulp, resulting in filling the pulp of the tooth after a slight discomfort may occur pain and discomfort, generally observe for a week or so. 2. Irreducible pulpitis: tooth decay is too deep may have caused a pulp infection, the state of the pulp after misjudgment, fillings will cause tooth pain, and with the passage of time, the pain will increase significantly. 3. Other teeth pain: tooth pain after filling, may be other teeth acute pulpitis, acute pulpitis attack general pain can not be localized, the outside world of hot and cold stimuli produce severe pain, specifically need to go to the hospital to identify the pain tooth. After filling the tooth is still painful, specific recommendations to the hospital in time to check the dental situation, found that the problem is dealt with in a timely manner.