After a child catches a cold and exhibits symptoms of nasal congestion, antihistamine medication can be taken orally under the guidance of a doctor to relieve nasal congestion. Local use of nasal drops or saline solution, or the use of nasal spray locally can also relieve symptoms of nasal congestion.

When a child has a cold causing nasal congestion, it is mostly because the nasal mucosa becomes congested and swollen after the cold, leading to the symptoms of nasal congestion. Some children may develop symptoms of allergic rhinitis after a cold. In addition to nasal congestion, most children may also experience symptoms such as a runny nose and sneezing.