Nasal congestion is the partial or complete blockage of nasal passages, leading to impaired nasal breathing, usually due to membranes lining the nose becoming swollen from inflammation of blood vessels, or an excess of mucus in the sinuses caused by illnesses like the common cold. == Background == In about 85% of cases, nasal congestion leads to mouth breathing rather than nasal breathing.
Nasal congestion is the partial or complete blockage of nasal passages, leading to impaired nasal breathing, usually due to membranes lining the nose becoming swollen from inflammation of blood vessels, or an excess of mucus in the sinuses caused by illnesses like the common cold. == Background == In about 85% of cases, nasal congestion leads to mouth breathing rather than nasal breathing.
Source: Wikipedia "Nasal congestion" · CC BY-SA 4.0
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