The self-healing period of nasal congestion in newborns. Nasal congestion in newborns is one of the common symptoms, which usually appears in the first few months after birth. This is because babies\’ sinuses and nasal cavities are small and easily clogged, especially before they learn to breathe through their mouths. However, nasal congestion in newborns usually resolves on its own and there is no need to worry. The following is the self-healing period and precautions for newborn nasal congestion. Nasal congestion period Baby\’s nose is very tender, so nasal congestion may last for weeks or even months. However, the self-healing period of nasal congestion is usually divided into three stages. During Stage 1, your baby\’s nose may feel a little blocked, but still