A baby with a cold and cough with phlegm may turn into pneumonia, if active medication, their own resistance, most can get better. Baby cold cough phlegm, most of the upper respiratory tract infection, if the infection symptoms continue to not relieve, the baby’s resistance to decline, no timely and effective treatment, with the worsening of the symptoms, may cause lung infection, into pneumonia. If the symptoms are mild, the baby’s resistance is normal, simple viral colds are self-limiting, most can get better on their own. If the symptoms are severe, take oral antiviral or antibiotic medication as prescribed by the doctor, most of them will not be infected into pneumonia. If your baby has a cold, take him or her to a regular hospital in a timely manner, and take effective treatment according to the degree of the cold, so as to avoid aggravating the symptoms of the infection and developing pneumonia.