If a newborn baby has symptoms of a cold at 40 days, parents need to use the following methods to deal with it. The first is to address the symptoms of nasal congestion for the newborn. Because after a newborn has a cold, he or she will often have a stuffy nose. After the nasal congestion will cause the newborn baby to cry at night and restlessness. In this case, parents can apply physiological sea salt water to wash the newborn’s nose or gently press the sides of the nose with their hands. The next step is to apply medication for colds. For example, the newborn should be given pediatric aminoglutethimide and so on. The last thing is to have a blood test. If the white blood cells in the blood are high, it is considered to be caused by bacterial infection. And if the newborn has a cold, he or she is in a poor state of mind, or even has a high fever that does not go away. In this case, parents should promptly apply antibacterial drugs to the newborn. For example, use the first or second generation cephalosporin treatment.