The duration of pain after tooth extraction is different for each person, some people have pain lasting for a few hours, some have pain lasting for 1 day, and some have pain lasting for 2 days, which is related to the pain threshold. Some people are naturally insensitive to pain and do not feel any pain after extraction. Some people are very sensitive to pain. According to general experience, the pain can be relieved by taking appropriate painkillers within 1 day after tooth extraction. Usually oral pain may appear on the 2nd day, but it is relatively mild and will not occur if the mouth does not make significant movements. However, some patients have very intense pain after tooth extraction, local odor and foul smell in the mouth, and redness, swelling, heat and pain, which need to be careful and alert to the possibility of dry socket and need to be treated by professional doctors. In conclusion, if a patient has been in pain after tooth extraction and cannot tolerate it, or even cannot sleep at night, he or she must go to the hospital for treatment, and the doctor can prescribe painkillers or pain pumps according to the condition. If the diagnosis is dry socket, it can be treated accordingly.