You can use ice on your forehead when you have a fever, not only on your forehead but also on your armpits and groin, because these places have large blood vessels that can easily distribute heat. When you have a fever, you can also take physical cooling methods such as drinking warm water, taking warm baths, and applying fever-reducing patches. It is important to note that if the patient is still in the period of rising body temperature, manifested as chills, non-stop shivering, this time is not suitable for ice, it is best to wait for the shivering to stop after the high fever period when the body temperature is higher than 39 ℃ using the ice method, so as not to stimulate the nerves, especially in children or the elderly may induce convulsions. High body temperature in addition to physical cooling methods, but also oral ibuprofen, acetaminophen, nimesulide and other antipyretic and analgesic drugs to assist in reducing fever.