Fever is mainly caused by viruses or bacterial infections, and these pathogenic microorganisms infect the lungs, throat and bronchial tubes, often showing symptoms of fever, muscle aches, general malaise, nausea and vomiting, and after stimulating the local airways and mucous membranes, it can also cause an increase in local secretions, which can irritate the mucous membranes and cause coughing. It is necessary to go to the hospital for a chest X-ray and blood tests for routine blood tests. If the cough is caused by a bacterial infection, it can be treated with effective antibacterial drugs, such as oral amoxicillin, levofloxacin, roxithromycin, as well as drugs to clear heat and remove fire, and drugs to relieve cough and phlegm.