Fever, cough and phlegm are mainly caused by respiratory tract infection. When the symptoms are not very serious, you can take oral medications to clear heat and remove fire, and you also need to actively treat with cough and phlegm relief medications, usually you can take oral Shuang Huang Lian oral liquid, Jin Yin Hua granules, and you also need to use snake bile and Chuan Bei liquid, Amino Bromide granules, Chuan Bei loquat cream and other medications. If the symptoms are more serious and there is high fever, you also need to use acetaminophen and ibuprofen to relieve fever and analgesia, and you also need to go to the hospital for routine blood tests. If the blood picture is high, it is mainly due to bacterial infection and needs to be treated with effective antibacterial drugs, preferably penicillin or cephalosporins. If you are allergic to these drugs, you can also use roxithromycin and azithromycin for antibacterial and anti-inflammatory treatment.