Phlegm in the throat of infants may be related to the dry environment, congenital diseases, respiratory tract infections, etc. It is recommended to give infants more water, supplemental nutrients, and the use of medication. 1. Environmental dryness: Infants with phlegm in the throat may be in a dry environment for a long time, without timely supplementation of water, the throat area in order to moisturize the throat will secrete a lot of liquid, thus causing phlegm accumulation. At this time to give the baby more water, give the baby more warm water can also help dilute phlegm. 2. Congenital diseases: infants with phlegm in the throat may be congenital diseases, such as congenital laryngeal webbing, laryngeal softening, laryngotracheal dysplasia, parents can give infants oral vitamin D and calcium, and improve the daily sleeping position, etc., can help reduce the phenomenon of phlegm in the throat. 3. Respiratory infections: Infants with phlegm in the throat may be caused by respiratory infections, such as colds, bronchitis, pneumonia, laryngitis and other symptoms of phlegm in the throat, can be utilized in the oral solution of aminobromine hydrochloride, aminobromoterol oral solution, etc. to eliminate phlegm. And symptomatic anti-inflammatory medication for the disease. Upper respiratory tract infections are mostly caused by viruses, and generally do not require special treatment with antiviral drugs. If combined with bacterial infection, should follow the doctor to use cefixime, amoxicillin and other antibacterial drugs; if the influenza virus is caused by the application of oseltamivir and other antiviral drugs treatment. All of the above drugs should be used under the guidance of a doctor, avoid self-medication. There are many other causes of phlegm in the throat of infants, and it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and then give targeted treatment or therapy.