Under normal circumstances, headache does not appear after tooth extraction, but if it causes headache after tooth extraction, two reasons need to be considered: 1. simple headache, which has nothing to do with tooth extraction, there may be neurological or other nature of headache, which needs to be seen in internal medicine. 2. it is possible that dry socket occurs after tooth extraction, which occurs about 3-4 days after tooth extraction. At this time, there will be a more obvious rotten and necrotic odor in the extraction sockets, accompanied by severe pain and radiating headache, facial pain and auriculotemporal pain on the same side. At this time, if you want to treat it, you have to go to the stomatology department of the hospital for debridement treatment, which requires the complete removal of the decaying and necrotic material from the extraction wound, and it usually takes about a week to heal completely.