Nasal congestion in 40-day-old babies is usually caused by congestion, edema and increased secretion of the nasal mucosa, and is recommended to be treated by lifestyle intervention and medication. 1. Lifestyle intervention: 40 days baby cold nasal congestion to general treatment, pay attention to indoor ventilation, appropriate milk, but also to be sea salt water nasal spray, dilute nasal secretions, promote nasal secretion out. 2. medication: 40 days baby cold if the bacterial infection caused by, if necessary, can follow the doctor’s instructions to apply antibiotics such as cefozoxime anti-infection treatment, if it is a viral infection caused by nasal congestion, if necessary, can be given to the sputum care, nebulization, and other symptomatic supportive treatment, the general application of antiviral medication is not special. If the symptoms of nasal congestion in a 40-day-old baby are severe, or if the symptoms persist and do not improve, the baby should go to the hospital in time for treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication to avoid danger.