runny nose; watery nasal mucus
Refers to thin, watery nasal discharge, as from a cold or allergies. Often used in contrast with thicker mucus. The cross-reference 水っぱな is a more colloquial variant.
See also: 水っぱな
My runny nose won't stop because of a cold.
花粉症の季節は水洟が出やすい。
During hay fever season, I tend to get a runny nose.
Standard kanji spelling; 洟 is a specific character for nasal mucus.
Common mixed kana spelling, avoiding the less familiar 洟.
Irregular kanji usage; 鼻 normally means 'nose', not specifically 'nasal mucus'.
Compound of 水 (mizu, 'water') and 洟 (hana, 'nasal mucus'), with rendaku voicing of hana to bana. The kanji 洟 is a specific character for nasal discharge.