If your baby has a yellow nose and a cold, the first thing you should do is to go to the hospital to have a blood test to see if the blood count is high and if there is a combination of bacterial infections. If your baby has a bacterial infection, you should treat the infection with antibiotics. If the blood picture is okay, the baby is in good general condition, and there is no fever, you can start with general care. Use hot compress to reduce the symptoms, use clean towel or gauze dipped in boiling water and wrung out, wrap it in layers, then put the layers of wrapped cloth at the root of the baby’s nose; you can also use nasal aspirator, because the baby’s nasal secretions are clogged, the more snot flows, parents need to clean it often, but wipe the baby with tissue, it will make the nose red and painful, so you can use nasal aspirator to help the baby suck out A large amount of snot. Before using a nasal aspirator, parents should check whether there are boogers in the baby’s nasal cavity. If there is, use a wet cotton swab to soften the foreign body before using the nasal aspirator. Be as gentle as possible to avoid going too deep into the baby’s nasal cavity and causing pain or injury.