Nasal irrigation with salt water (saline) is also called nasal wash, rinse, douche, or lavage. This is often recommended by physicians to reduce the frequency and severity of the symptoms associated with inflammation of the nose owing to allergies or other causes. Nasal irrigation can also reduce the number and severity of infections of the sinuses. Nasal irrigation works by thinning and removing mucous, clearing proteins that cause inflammation, and flushing out nasal allergens, irritants, and bacteria from the nose and sinus cavities.
Stokken JK. Saline Irrigation and Topical Nasal Steroids. JAMA Otolaryngol Head Neck Surg. Published online July 18, 2019. doi:10.1001/jamaoto.2019.1713
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