Children’s phlegm is usually due to upper respiratory tract infections, bronchitis and other diseases caused by expectoration can take aminobromine hydrochloride, carboxymetholestane granules, guaifenesin glycol ether syrup and other drugs for expectoration. 1. Ambroxol hydrochloride has a good mucous phlegm dissolving effect and lubricating effect on the respiratory tract, which can promote the secretion of active substances on the lung surface, secretion of respiratory fluid and cilia movement, thus significantly promoting the expectoration of phlegm. 2. Carbocisteine granules are mainly used for children with thick and sticky sputum, which can make sputum viscosity decrease mainly because of reducing the secretion of bronchial glands, increasing the secretion of low viscosity salivary mucin and reducing the secretion of high viscosity mucin, making sputum become thin and making sputum easier to be coughed out. 3. Guaifenesin Glycerol Ether Syrup is mainly used for those who have much phlegm, cough, and phlegm with bad smell, which can not only make phlegm thinner, but also reduce phlegm after taking it. It can be used for coughing, bronchial dilatation, lung abscess, mucus is not easy to cough out. It should be noted that not all children with excessive phlegm will be treated with medication, and those with milder symptoms may be relieved by drinking more water and resting more, without special medication. There is also a large group of herbal phlegm remedies in the use of phlegm remedies. There are many possible reasons for your child’s phlegm, so you should go to a regular hospital to get a clear picture of the cause of your child’s phlegm, and then choose the appropriate medication under your doctor’s guidance. All of the above drugs should be used under the guidance of a doctor.