A runny nose in newborns usually heals itself in a few days, depending on the specific cause and the individual situation of the child, and should be analyzed on a case-by-case basis. The immune system in the human body can fight against infected bacteria and viruses, and thus has a certain ability to heal itself. For newborns, the immune system is not well developed, so if the cold is mild and the nose is runny, most of them can get better in about 7 days, but if the symptoms are more serious or progressively aggravated, they should go to the neonatology department of the hospital in time to get treatment after the cause is clear. For breastfed children, because breast milk contains a certain amount of antibodies can help improve the immunity of newborns, which is conducive to the baby’s recovery. In addition, when newborns have symptoms of cold and runny nose, try to maintain a warm, comfortable and sunny indoor environment, and pay attention to regular indoor ventilation to ensure fresh air. If the caregiver has a respiratory infection, pay attention to isolate it from the baby.