After taking antipyretic medicine for a while, after a few hours and then fever, medication if more than 4 hours can follow the doctor’s advice to take another antipyretic medicine, or give physical cooling, and promptly to the hospital to find out the cause of the disease, for the cause of the treatment. Fever, general body temperature over 38.5 degrees, it is recommended to take antipyretic drugs. If you take antipyretics for a while after a few hours and then burn, you can give physical cooling, such as the use of antipyretic patches, lukewarm water baths, placed in the forehead, armpits and other parts of the ice packs. If the physical cooling effect is not good, from the last time to take antipyretic time more than 4 hours, can again take antipyretic. Commonly used clinical antipyretics include ibuprofen and acetaminophen. Ibuprofen is used for children over 6 months of age and adults. Acetaminophen is used for children over 2 months of age and adults. However, fever-reducing medications and physical cooling are only symptomatic treatments for fever. Patients should seek medical attention to find the cause of the fever and treat the cause in order to completely relieve fever symptoms. Common causes of fever include infectious fever and non-infectious fever. Infectious fever is mostly caused by infection of bacteria, virus, mycoplasma, fungi, etc. Non-infectious fever is commonly caused by endocrine metabolic abnormalities or absorption of sterile necrotic material, autonomic dysfunction, etc. In clinical practice, infectious fever is the most common cause. Infectious fever is the most common clinical condition and usually requires anti-infectious drug treatment. Please follow the doctor’s instructions for fever medication, and drink plenty of fluids and take rest during the fever period. The use of drugs must follow the doctor’s instructions, not blindly use their own drugs, in order to avoid adverse consequences.