The trade name of headache powder is Acetaminophen San, its main ingredient is acetaminophen, it is a white powder drug, mainly by inhibiting the synthesis of prostaglandins, as well as blocking the impulses of the nociceptive nervous system, to play a pain-relieving effect. It is mainly for headache and fever caused by cold, but also for some pain, such as toothache, joint pain and menstrual pain. However, it is contraindicated in patients who are allergic to such drugs, and should also be used with caution in patients with gout and cardiovascular diseases, impaired liver and kidney function. Regular use of this drug may lead to drug resistance and addiction. If applied frequently in the elderly, it may lead to impaired liver and kidney function, causing a serious decrease in kidney function. It should be applied in small doses and for short periods of time only when the patient’s pain is more pronounced.