After a baby has a cold, i.e. an upper respiratory tract infection, some colds can heal themselves within 7 to 14 days, while some colds develop complications such as bronchitis and bronchopneumonia, which are not self-healing and require treatment. When the baby’s body resistance is relatively good and at the same time the virulence of the invading pathogens is relatively low, for example, when upper respiratory tract infections, i.e. colds, are caused by rhinoviruses and parainfluenza viruses, some children can manage to recover by self-healing. Usually the illness lasts 7-14 days to get better. When a child’s resistance is lower or the pathogen is more virulent, it is difficult to heal on its own. For example, adenovirus infections in small infants often result in a sudden onset of high fever and, after four to five days of high fever, more severe respiratory distress, which can develop into a more difficult-to-control pneumonia, a condition that requires prompt treatment. Babies need bed rest, reduce crying, and low-flow oxygen if necessary; at the same time combined with Ambroxol and other sputum, wheezing babies need budesonide, terbutaline sulfate and other nebulizer treatment; combined with bacterial infections, you should also use cefaclor, cefdinir and other anti-infective. The causes of baby colds are very many, the pathogens are also diverse, so it is recommended that if the symptoms are more obvious, or need to actively seek medical attention, find the cause, if necessary, with the doctor active treatment, the above medication to follow the doctor’s instructions, avoid self-medication.