The most common causes of fever and cough are respiratory infections, which are related to the site of infection, the causative organism, and the individual’s constitution; some patients get better within a few days, while some take weeks or even months. The exact time should be determined on a case-by-case basis. Upper respiratory tract infections are usually relatively mild, especially viral infections, and are self-limiting. Ensure adequate rest and nutritional intake, take antiviral drugs, fever, cough and other symptoms can be improved after a few days of medication, such as fever, cough prolonged, may appear in the lower respiratory tract infections, such as pneumonia, etc., should be to the regular hospital to avoid delay. Lower respiratory tract infections such as pneumonia are the most common, bacterial or viral infections, if there are no other complications, after regular treatment, the fever will improve in about three days and the cough will recover in a few weeks. Bacterial infection causing lung abscess or even abscess chest, need to be hospitalized for comprehensive treatment, local abscess drainage at the same time given anti-infective treatment for four to eight weeks, fever, cough and other symptoms recover more slowly. Tuberculosis, fungi and other special pathogens infections, treatment is relatively longer, the symptoms can last several months. Although cough and fever are common symptoms of respiratory tract infections, recovery time should be determined on a case-by-case basis. Patients with symptoms should consult a regular hospital in a timely manner to make a clear diagnosis and give reasonable treatment to avoid delays in treatment.