There are many reasons for toothache after tooth extraction, such as: damage to neighboring teeth caused by the extraction process, nerve damage caused by tooth extraction, infection and other reasons. 1. The extraction process causes damage to neighboring teeth: the extraction process may use some instruments to remove the root of the tooth with force, which will cause some damage to the tooth bed, involving the surrounding teeth, or operation damage to the neighboring teeth, so the other teeth will be painful after the extraction. 2. Nerve damage caused by tooth extraction: the stimulation of tooth extraction will cause damage to the local gums, nerves, alveolar bone and other tissues, nerve damage, may pull other teeth, so there will be other toothache after tooth extraction. 3. Secondary infection: after tooth extraction, if there is secondary bacterial infection in the wound, it will also cause inflammatory swelling and pain in the neighboring teeth, so there will be pain in other teeth after tooth extraction. There may be other reasons why other teeth hurt after extraction, so it is recommended to go to the hospital in time for examination and treatment as prescribed by the doctor.