When a child has a non-stop cough, the first thing to observe is whether it is an irritating dry cough or a cough with phlegm. If it is an irritating dry cough, the child can be treated with cough suppressants to avoid uncomfortable symptoms, and the child can be treated with finasteride syrup, which contains central sedatives and cough suppressants and is still effective. If the cough has phlegm, it should not be treated with simple cough suppressants, which are not conducive to the discharge of phlegm, but will aggravate the infection and worsen the cough instead. At this time, it is necessary to use phlegm-suppressing drugs, such as aminoglutethimide oral solution, aminoglutethimide hydrochloride, pulmonary cough combination or compound fresh bamboo cough solution. If there is an elevated white blood cell count, the cough is caused by a bacterial infection and the child can be treated with oral cefixime pellets. If there is no elevation of leukocytes but there is an elevation of C-reactive protein, the cough is often caused by a viral infection and the child can be treated with Pudilan Anti-inflammatory Oral Liquid or Four Seasons Antiviral Combination.