In daily life, fever is very common, people often treat it as a result of “cold”, but many diseases are manifested by “cold” in the early stage, but if the “cold” treatment does not improve in 2 or 3 days, you should go to the hospital in time to avoid delaying the disease. If you do not see improvement, you should go to the hospital in time to avoid delaying the disease, which may be infectious fever, such as pneumonia, rheumatism, measles, typhoid, etc., or non-infectious fever, such as tumor, remittance, leukemia, etc. And once there is a fever, regardless of the temperature, the application of antipyretic drugs or hormones, which is very wrong, because antipyretic treatment does not cure the symptoms, but also cover up the disease; cold and fever in the use of antipyretic drugs should also pay attention to, to prefer physical cooling (ice pillow, alcohol rub desire, warm water rub desire) rather than drug antipyretic, antipyretic fast to the body tissue, cells are harmful. In addition, the elderly with strong antipyretic drugs after a lot of sweating also lead to insufficient blood volume, heart and brain ischemia, lack of oxygen, easy to cause heart attack or cerebrovascular accident, so should slow down the fever and drink an appropriate amount of plain water, especially those with cardiovascular and cerebrovascular disease should be cautious with strong antipyretic drugs. Febrile diseases have many accompanying symptoms and signs, such as chills, rash, enlarged lymph nodes, enlarged liver and spleen, bleeding, cough, coughing, chest pain, chest tightness, shortness of breath, abdominal pain, diarrhea, etc. Doctors can make preliminary judgments based on their accompanying symptoms or signs, and then conduct laboratory and imaging examinations, so do not dispose of fever at will when it appears. Tip: “Fever is a symptom, the etiology looks simple, but is actually more complicated, and needs to be handled with caution”.