Nasal congestion in infants exposed to cold is usually self-cleaning in about a week, but it depends on the specific circumstances and cannot be generalized. Infants may have nasal congestion, runny nose, cough, fever and other symptoms of upper respiratory tract infections, usually caused by viruses, if you consider bacterial infections or combined bacterial infections need to be given antibiotics, but also can be prescribed to take medication to clear away heat and detoxify the toxins. Parents can use warm towels on both sides of the child’s nose to promote breathing. If the child is unable to sleep because of breathing difficulties, you can pick him up vertically or switch to the other side to relieve the symptoms of nasal congestion, or use physiological seawater to do nasal rinsing to relieve the symptoms. Infants’ rooms should be kept at an appropriate temperature of 25℃-26℃, and air conditioners or fans should not be used directly against the child to avoid aggravating the cold or nasal congestion. It is recommended that children pay attention to body warmth, avoid being cold, and drink plenty of warm water. If the symptoms do not improve, or persistent high fever, poor mental health, etc., need to go to the hospital as soon as possible to the Department of Pediatrics, a clear diagnosis and targeted treatment.