The reason why the tooth still hurts after 5 days of nerve-killing medicine may be due to internal infection or periapical inflammation, as follows.
1. Internal infection: If there is an infection in the root canal, the pulp inactivator is unable to fight the infection, and the pulp that has not been completely inactivated will feel pain.
2. Periapical inflammation: If periapical inflammation exists and an acute phase reaction occurs during the sealing period, even if the pulp has been completely inactivated, the inflammation stimulates the periapical tissues and causes pain.
There may be other reasons for toothache. If the symptoms of toothache are severe or persist without improvement, you should go to the hospital in time, clarify the cause of the disease with the help of the doctor, and carry out targeted treatment.