Excessive secretion of mucus by the mucous membranes lining the nose (see rhinitis), sinuses (see sinusitus), or upper air passages, due to inflammation.
| Catarrh | 
|  | 
| Catarrh | 
| Excessive secretion of mucus by the mucous membranes lining the nose (see rhinitis), sinuses (see sinusitus), or upper air passages, due to inflammation. | 
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