Coughing with phlegm after a cold is usually a result of ineffective control of the disease or low immunity of the organism causing cross infection and damage to the disease. In Western medicine, if it is caused by a virus, symptomatic treatment with antiviral drugs can be administered. If it is caused by bacterial, give antibiotic drugs for symptomatic treatment. Antibiotic drugs include cephalosporins, penicillins, macrolides, which can be combined with cough and phlegm medicines, and if necessary, hormone drugs can be given for symptomatic treatment. If there are symptoms of high fever, ibuprofen suspension can be given as symptomatic treatment. In traditional Chinese medicine, wind-cold cough can be treated with cough suppressant plus reduction, which has the effect of removing wind and moistening the lung and is mainly used for coughs that persist or recur. If the immunity is low and causes heavy sensation, you can take Yu Ping Feng granules for a long time to improve the immunity.