also: びせんじょう
nasal irrigation; nasal lavage
Medical and home-care practice of rinsing the nasal passages with saline solution. The term is neutral and used in both clinical and everyday contexts.
I do nasal irrigation every day to relieve hay fever symptoms.
鼻洗浄には専用の器具と生理食塩水を使います。
For nasal irrigation, use a dedicated device and saline solution.