Newborns often have obvious symptoms of upper respiratory tract infection after a cold, among which runny nose is very common, and often after other cold symptoms disappear, there is still a lot of runny nose, which is due to the immature development of the nasal cavity of newborns, small nasal cavity, rich nasal mucosa blood vessels, and more secretions. Viral cold and flu will be clear and nasal congestion, yellow nasal discharge may be combined with bacterial infection; frequent white nasal discharge may be a lack of vitamin A and vitamin B; long-term flow of pus-like yellow-green nasal discharge, pay attention to sinusitis. Common methods to reduce cold and runny nose: (1) take about 40 ml of light salt water, cotton swabs dipped in lightly coated nasal cavity, can help the newborn nasal mucosa congestion; (2) take vinegar 1:1 ratio with water boiling, let the steam fill the room, can kill indoor germs, at the same time vinegar can help converge nasal secretions; (3) gently newborn nasal wings on both sides of the Ying Xiang point, can reduce runny and nasal congestion; (4) drink more warm water (4) Drink more warm water and let your baby sleep as much as possible. (5) You can buy nasal saline online to rinse the nasal cavity. Because the child will not remove the nasal discharge by itself, the mother should carefully clean the baby’s nasal secretions, use soft tissue or hand towel to help the child wipe the nasal discharge, gently dip the baby’s skin to avoid injury. If the child simply has a runny nose without other uncomfortable symptoms, there is no need to worry too much, and it usually takes a few days to gradually return to normal.