It is recommended to seek medical attention as soon as possible to lower the fever physically and to give antipyretic medication as prescribed by the doctor, and to treat the cause of the fever.
A fever of 40 degrees late at night is dangerous and should be treated with fever-reducing medications such as acetaminophen, ibuprofen, and diclofenac sodium.
At the same time with physical cooling, such as the use of ice ice packs, warm water bath, etc., in the bath, to the distribution of blood vessels in the rich parts, such as the chest, back, armpits, groin and other parts of the rubbing a few times.
For the cause of fever, you need to take targeted treatment.
Late-night fever of 40 degrees, you need to go to the hospital in a timely manner, by the doctor to take treatment, to avoid delaying the treatment. You can’t simply reduce the fever, you need to identify the cause of the fever, and take treatment for the cause.