The 4th day of tooth extraction still hurts, may be a normal phenomenon, may also be secondary infection and other reasons, need to be combined with other conditions to determine. 1. The 4th day of tooth extraction is still painful normal situation: tooth extraction stimulation will cause swelling of the gums, local nerve damage, after the extraction of teeth will cause swelling and pain in the gums, if the 4th day of only slight pain, than before the pain gradually reduced or disappeared, just paroxysmal pain most of the normal recovery process. 2. The 4th day of tooth extraction is still painful abnormal situation: the 4th day of tooth extraction is still painful, if the pain is more serious than the previous pain, it may be secondary to bacterial infection, may be caused by complications such as dry socket disease. The fourth day of tooth extraction still hurts, need to go to the hospital in time to check, if it is a normal recovery process does not need treatment, if there are complications need to be actively treated.