Infants and young children need to identify the cause in order to eradicate, may be physiological or pathological. Pathologic causes need to be under the guidance of the doctor for targeted treatment, such as medication. 1. Physiological: If there is thin nasal mucus blocking the nasal cavity, you can use a cotton swab or baby nasal aspirator to suck out the nasal mucus inside the nasal cavity. If it is a dry nasal crust or milk stains, choking on milk when choking the baby inside the nasal cavity to block the nasal cavity. Saline seawater nasal spray can be used to rinse the nasal cavity, to be softened inside the dry nasal crust, and then use the baby special tweezers will be inside the dry nasal crust clip out. 2 pathology: infant nose, need to take the baby to the hospital in time for a detailed examination, by the doctor to clarify the severity of nasal congestion, check the baby’s nasal cavity inside whether there is secretion, timely cleaning of nasal secretions. If the nasal blockage is caused by upper respiratory tract infection, such as bacterial infection, timely use of sensitive antibiotics for anti-infection treatment, such as cefixime. In addition, there are other pathological factors that can lead to similar symptoms, such as rhinitis and allergies. To summarize, parents are advised to bring their babies to the doctor in time, after the doctor clarifies the cause of the disease, to give targeted treatment, do not blindly operate on their own, so as not to damage the mucous membrane of the nasal cavity, and the above drugs need to be used under the guidance of a doctor.