Why am I in pain after a tooth extraction?

Generally any discomfort after an extraction does not last for long and can easily be controlled by the painkillers you would normally take for a headache. If it lasts any longer than 24 hours you should go back to your dental team for advice.
Sometimes pain may occur 3-4 days after the extraction when a blood clot has not formed properly in the extraction socket and the bone becomes infected. You will need to go back to your dentist, who will dress the socket for you. 

More information:

What to do after a tooth extraction


Dental Helpline