Cefaclor can be used as prescribed by the doctor for a 4 year old baby with a cold and a stuffy and runny nose due to bacterial infections. Cefaclor can be used for infections caused by sensitive bacteria, such as respiratory infections, such as tissue infections, ear, nose and throat infections, skin infections, etc. Colds caused by sensitive bacterial infections can be treated with the drug under the guidance of a physician for anti-infective treatment. Colds may also be caused by viral infections, self-limiting, generally do not need special treatment, usually take proper rest, drink more water, eat nutritious food, clean up the nose in a timely manner, keep the airway open, nasal congestion is serious, you can use sea-salt nasal spray to reduce the nasal mucosal edema, which is conducive to relieving nasal congestion and runny nose symptoms. Cefaclor needs to be used under the guidance of a doctor, not self-medication. When the child has a cold, nasal congestion and runny nose, it is recommended to bring the baby to the doctor in time to determine the cause of the disease and then carry out the relevant treatment.