Summary of case history ,Patient Wang, male, 3 years and 7 months. This patient went to the pediatric outpatient clinic on July 9, 2020 because of "repeated cough for more than half a year, aggravated by 1 week". The child has a history of allergic rhinitis, and always had nasal congestion and runny nose. He also had pneumonia six months ago, and still coughed repeatedly after discharge. There was sputum in his throat, which was difficult to stick. Symptoms got worse very time he caught cold. He went to the local community hospital for treatment. Lung X-rays showed no obvious abnormalities. He was given symptomatic treatment with cough and expectorant drugs such as "dicough, eucalyptol, limonene and pinene enteric capsules". After treatment, the child's cough and expectoration could be relieved, but there were still recurrences. One week ago, the child coughed frequently after catching cold, with sputum in the throat, fever, the highest body temperature was 38.4 ℃, accompanied by sore throat, nasal congestion with clear nasal discharge, nausea, vomited gastric contents once, denied jet vomiting, without dizziness and headache. His parents immediately treated him with Chiqiao Qingre granules and Ibuprofen Suspension. Then the fever subsided, nausea and vomiting relieved, but the cough still existed, with nasal congestion, turbid nasal discharge. So they went to the pediatric outpatient department of our hospital on July 9.,TCM diagnosis ,Cough, phlegm-stasis in lung channels.,Western medicine diagnosis ,Chronic cough, upper airway cough syndrome.,Therapeutic methods ,Qingfei Tongluo formula, which was composed of cortex mori radices , perillaseed, lepidium seed, almond, peach kernel and glycyrrhiza uralensis. Take it with boiled water, 1 bag each time, twice a day. Asked the children to avoid cold, greasy and irritating food in their diet, be careful in their daily life, avoid the wind and cold, take rest and avoid strenuous exercise.,Clinical outcomes ,After treatment, the children recovered from cough and spontaneous sweating. After a follow-up of more than 6 months, the children no longer coughed and expectorated repeatedly. They occasionally had nasal congestion and runny nose during seasonal changes, and the frequency of respiratory tract infection was greatly reduced. They continued to be treated with Yupingfeng powder and Yunpi Huatan Tongqiao formula for more than 6 months to replenish Qi, strengthen the spleen and enhance body quality.