Discuss the strategies for dealing with nasal congestion, vomiting, and phlegm in breast milk after neonatal pneumonia discharge, and provide breastfeeding advice.

At around 40 days old, the baby makes a sniffling sound while breastfeeding, which might be caused by excess mucus or underdeveloped laryngeal cartilage.

Two-month-old babies with nasal congestion should avoid using medication containing amantadine and are recommended to use cold medicine without this ingredient.