When your baby has a yellow runny nose and cough with a cold, you can choose the treatment according to the severity of the condition at your discretion. If the symptoms are not very serious, you can drink some warm water regularly and pay attention to washing the face and nose with warm water regularly or spraying the nose with a physiological sea salt water sprayer, making sure to clear the nasal passages to ensure a clear nose and relatively clean nasal passages. If the symptoms of the cough are relieved after the nose problem is significantly relieved, it means that the cough is due to postnasal drip and there is no need to treat the cough alone. If the relief of the nose symptoms is obvious and the cough still persists or is accompanied by the sound of obvious phlegm and the phlegm is not easily coughed up after coughing, you need to consider the use of phlegmolytic drugs, such as oral aminoglutethimide hydrochloride and, if necessary, nebulized inhalation therapy. If the cough is more severe and the symptom relief is not obvious, especially if it is accompanied by fever and poor mental status, you need to go to the hospital and ask the doctor to listen to and examine the body to determine the condition of the trachea and lungs and to identify whether there is acute bronchitis or even pneumonia for early and timely treatment.