Children have sore throat, cough and phlegm in their daily life. The common cause is the child's common cold, bronchitis or pneumonia. In this case, parents can first give the child Jizhi syrup or ambroxol to stop coughing and expectoration, which can also relieve the symptoms of sore throat. Then, we need to go to a regular hospital for pediatric registration and treatment. Through blood routine examination, C-reactive protein examination, etiology examination, chest X-ray examination, we need to identify the specific cause of the disease, and under the guidance of doctors, we can give scientific and standardized treatment. Due to the different causes and severity of the disease, the treatment plan is also different. Parents should never give other drugs to their children indiscriminately, and avoid misusing folk remedies to prevent improper treatment. The above scheme is only for reference. Please use the specific drugs under the guidance of professional doctors according to your own conditions.