The three elements to promote rapid reduction of fever in adults are etiology treatment, cooling treatment and clinical care, the lack of any one of which is not conducive to the reduction of fever and may lead to prolonged or even aggravation of the condition. A. Etiological treatment Active treatment of the cause of fever is the fundamental solution to fever. For example, for infectious fever, effective drugs should be selected according to the source of infection; for non-infectious fever, patients with dehydration should be actively treated with rehydration; when drug reactions occur, drugs should be stopped immediately and anti-allergy treatment should be carried out. (1) Ice pack: place the ice pack on the head, axilla and groin, the ice pack should be wrapped in a dry towel and then used; (2) Alcohol bath: use 35%-50% ethanol solution to rub the patient in a supine position, from the neck down along the outside of the arm to the back of the hand, then change a small towel, from the armpit along the inside of the arm to the palm of the hand, wipe the opposite side in the same way; then, from the groin through the leg Wipe to the foot, in the rub to the large blood vessels near (such as the axilla, elbow, inguinal area, popliteal fossa and other parts), should be a little stay, in order to improve the therapeutic effect. 2.Drugs to lower the temperature Patients with high fever can use drugs including aspirin, 0.3-0.6g, taken orally, once every 4 hours if necessary; Anacardium injection 2ml, injected intramuscularly; Anacardium nasal drops can also be used; for patients with high fever that does not subside, glucocorticoids such as dexamethasone can also be considered. Clinical care Patients need to rest in bed, drink more water, and give a light, easy-to-digest diet.