It is recommended to take analgesics after tooth extraction, mainly primary as well as secondary analgesics, commonly ibuprofen, fenbendazole, tramadol, etc. In normal tooth extraction, there will be obvious pain after one hour, because most of the effect of anesthesia itself will have disappeared after one hour, and the patient will feel obvious pain, at which time analgesic drugs can be taken. Clinically, analgesic drugs are taken in steps, and the first and second steps are relatively more common. The first step is called antipyretic and analgesic drugs, and the common ones are aspirin, ibuprofen, etc. The second ladder is called weak opioids, common tramadol, codeine and so on. The third step is called strong opioid, and the common ones are morphine. Clinically, for pain after tooth extraction, the first step and at most the second step are applied.