Nasal congestion or "stuffy nose" happens once nasal and adjacent tissues and blood vessels become swollen with excess fluid, inflicting a "stuffy" blocked feeling.
Nasal congestion could or might not embody a nasal discharge or "runny nose." Nasal congestion sometimes is simply an annoyance for older kids and adults.
But nasal congestion is serious for kids whose sleep is disturbed by their nasal congestion, or for infants, who may need a tough time feeding as a result.