Nasal wash is a commonly used means of nasal care, commonly used cleaning solution for saline, the benefits are: relieve rhinitis symptoms, increase nasal humidity, promote mucosal cilia function recovery. 1. Relieve the symptoms of rhinitis: nasal wash can effectively wash out the viscous secretions, allergens and dirt in the nasal cavity, reduce the stimulation of inflammatory factors and toxins on the nasal mucosa and nerves, and alleviate the discomfort of rhinitis such as nasal foreign body sensation and nasal congestion. 2. Increase nasal humidity: Nasal wash can increase nasal humidity, avoid nose too dry and lead to nosebleed. 3. Promote the recovery of mucous membrane cilia function: nasal wash can remove mucus in the nasal cavity at the same time, promote the swing of the nasal mucous membrane cilia, restore the normal physiological function of the nasal cavity. It is recommended to standardize the operation under the guidance of the doctor to avoid causing damage.