Infants with sputum spitting out may be related to cartilage dysplasia or respiratory tract infections, depending on the cause of the disease can be treated with calcium supplements, nebulization, oral medication and other ways. 1. Laryngeal cartilage dysplasia: infants with sputum spitting out may be cartilage dysplasia, may give the impression of sounding like sputum spitting out, at this time it is usually recommended to take vitamin D and calcium supplementation and other ways of treatment. 2. Respiratory infections: Infants with respiratory infections, such as bronchitis, may not be able to spit out phlegm. If the phlegm is thick and sticky and not easy to cough up, you can use drugs such as acetylcysteine for nebulization treatment. At the same time to clarify the cause of infection, to give targeted treatment, such as the presence of bacterial infection can be oral cefaclor and other antibiotic treatment. In addition to medication, parents can moderate patting on both sides of the infant’s chest and back, from bottom to top, to help the phlegm in the airway through the vibration of the discharge, and appropriate to give the infant more water to dilute the phlegm and so on. All of the above medications should be used under the guidance of a doctor. If the symptoms of spitting up phlegm in infants are serious or have not improved, it is recommended to go to the hospital in time.