It is possible that your baby has developed a viral infection like a cold which is blocking his nose, but it is unusual for such a young baby to have such a blocked nose. You can try infant saline nose drops twice a day, but if his nose does not clear after 2 days there must be some other reason for his very blocked nose.Sometimes a baby is born with a complete blockage of one or both notrils. This condition is called choanal atresia. If your paediatrician suspects this diagnosis it is necessary to get the opinion of an ENT specialist.
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