Children with phlegm in the throat can be seen in physiological phenomena, pathological conditions (such as respiratory tract infections), there is no rapid expectorant method, need to be based on the causes of reasonable intervention, such as bacterial infection caused by respiratory tract infections, the need for anti-infective treatment. 1. Physiological phenomenon: coughing is a normal reflex mechanism of the body, for children who sleep for a long time after waking up, the phenomenon of respiratory phlegm can occur, usually through coughing can be discharged, the phenomenon of “phlegm in the throat” can be significantly improved, which belongs to the normal physiological phenomenon, without special intervention. 2. Respiratory infections: such as acute bronchitis, often caused by bacteria (such as Streptococcus pneumoniae, etc.), Mycoplasma pneumoniae or viral infections (such as respiratory syncytial virus), the phenomenon of phlegm in the throat, accompanied by coughing, fever and other symptoms. Treatment of suspected bacterial infection requires the use of antibacterial drugs (such as cefaclor) anti-infective treatment, while oral aminoglutethimide symptomatic phlegm treatment, for serious cases, the use of budesonide nebulizer treatment, and strengthen the back patting and other care. All of the above drugs should be used under the guidance of a physician, and it is recommended to consult a specialist for assessment and judgment to clarify the cause and provide reasonable treatment.