The infant’s nose should not be pinched. Once pinched, the infant can only breathe with the mouth open, which will result in restricted ventilation of the upper airway, leading to lack of oxygen during sleep and affecting the infant’s sleep quality. Clinically, if parents find that their infant’s nose is not ventilated during sleep, it is recommended that they take the child to an ENT clinic to see if there are any nasal stools blocking the nasal cavity. If there is a blocked booger, you can ask the doctor to suction it out with a suction device or you can buy a special nasal aspirator for infants to suck the booger. Some babies may have nasal congestion due to cold or upper respiratory tract infection, in which case the pediatrician can prescribe some medications to improve the congestion. Generally speaking, most infants have nasal congestion due to nasal cavity and nasopharynx, but in individual cases, if nasal congestion occurs for a long time and medication is ineffective, the possibility of adenoid hypertrophy cannot be ruled out. If you find that your baby’s nose is not ventilated during sleep, remember not to pinch the nose, but to go to the hospital for active treatment.