There are more causes of cough in children, and cough with phlegm can be treated through symptomatic treatment as well as allopathic treatment: I. Symptomatic treatment: 1. Cough and phlegm-relieving drugs: When children have cough with phlegm, they can first use drugs such as orange red tablets, oral solution for children with lung fever and cough, and loquat leaf paste to relieve cough and help dissolve and expel phlegm. If the effect of expectoration is not satisfactory, mucolytic drugs, stimulant expectorants and nauseating expectorants can be used to assist in expectoration, such as bromhexine, acetylcysteine, and oral solution of compound orangiferine ammonium chloride, etc. 2. Commonly used drugs include salbutamol, gentamicin, terbutaline, etc. 3. Daily care: When a child has a cough with phlegm, parents can gently pat the child’s back to help the child expel the phlegm, while allowing the child to drink more warm water and eat fresh fruits and vegetables to help the child recover physically, but should not eat spicy, stimulating, pickled foods to prevent aggravating the symptoms. Second, the cause of treatment: 1, cold: children with fever and cold will appear cough can be accompanied by coughing symptoms, because of the child’s weak constitution, you can first use the back pat expectoration, nebulization inhalation treatment and other methods, and try to keep the child’s environment in the air moist. If the effect is not obvious, you can use wind-cold cough granules, anti-inflammatory and antibacterial antibiotics and antipyretic drugs for treatment under the guidance of a doctor; 2. Variant asthma: Variant asthma is a respiratory disease in children with cough as the main symptom, which can be accompanied by coughing sputum. This drug can reduce the respiratory resistance and alveolar tone of children, which can significantly reduce the symptoms of cough and sputum and improve the function of the respiratory tract; 3. Inflammatory reaction: for children with pharyngitis, rhinitis and bronchitis, when inflammatory reaction occurs, the respiratory tract mucosa and body tissues are stimulated by inflammation, which may trigger the symptoms of cough and sputum, at this time, antibiotics can be used for anti-inflammatory treatment, and catecholamines can also be used to help dilate the bronchial tubes This can be treated with antibiotics and catecholamines to help dilate the bronchi to relieve the cough and sputum. Due to the young age of the child, it is recommended that the correct and reasonable use of medications be made under the guidance of a doctor. If the condition is not relieved or worsened after the use of medications, prompt medical attention is required.