Fever and cough are most commonly associated with respiratory tract infections and lung infections, and can also be seen in patients with tuberculosis, lung cancer, and heart failure. Fever and cough should not be relieved immediately, but the source of the disease should be identified and treated accordingly. If the patient has a fever, accompanied by mild cough, runny nose, limb pain and weakness, sore throat, may be upper respiratory tract infection, routine blood tests to help diagnose the pathogen (such as leukocytes, neutrophils, suggesting that bacterial infections, if the white blood cells are normal or decreased, lymphocytes, suggesting that the viral infections), you can target the anti-inflammatory or antiviral drugs, as well as some antipyretic drugs. For patients with fever, cough, wheezing, more sputum, thick sputum or sputum with blood, or even obvious rales, lung infection should be considered. At this time, a clear diagnosis is needed, in addition to routine blood tests, c-reactive protein and antibodies to Mycoplasma pneumoniae and Chlamydia pneumoniae, combined with clinical imaging to exclude organic lung lesions. After a clear diagnosis, anti-infective drugs such as penicillin and cephalosporins are routinely used; macrolides or tetracyclines or quinolones are preferred for mycoplasma and chlamydia infections. If the patient has a prolonged low-grade fever, accompanied by coughing up sputum with blood in the sputum, chest pain, night sweats and emaciation, etc., the possibility of pulmonary tuberculosis should be considered. Severe heart failure patients, in addition to fever will be accompanied by cough, cough pink foamy sputum, this time the need for timely admission to the hospital for treatment, to give oxygen and monitor vital signs, if necessary, combined with resuscitation measures. Fever and cough are relatively common symptoms, the specific treatment needs to be combined with the physical condition, if the disease is mild, you can self-medicate antipyretic drugs (such as acetaminophen tablets) and cough and phlegm medication (aminoglutethimide, dioxaprozine, phenylpropylpiperazine, etc.), if it is a serious disease, it is necessary to hospitalize in a timely manner to carry out systematic treatment.