If a child chokes on milk and coughs up quickly after drinking milk, he may not have any symptoms, but if he chokes on milk and does not cough up completely after drinking milk, he may have a mild cough, perioral spitting and other symptoms. Once a child has symptoms such as perioral froth, cough and sputum, and does not have a cold, he or she needs to be heard and examined in detail under the guidance of a hospital doctor, and if it is clear that aspiration trachea or lung inflammation has formed, treatment should be given as soon as possible. In mild cases, oral medication can be given to reduce phlegm and cough, such as aminoglutethimide oral solution or pulmonary cough combination, etc. It can also be combined with nebulized inhalation to reduce phlegm and cough, and in severe cases, intravenous infusion treatment is needed.