Nasal rinsing is a method in which the rinse solution is squeezed into the nasal cavity through a simple device that connects the rinse to the nostril, and with the help of appropriate pressure, the rinse solution is squeezed into the nasal cavity so that it comes in contact with the mucous membrane of one side of the nasal cavity from front to back and then flows out from the other nostril, alternating between the two sides. Nasal rinsing technique is widely used in the treatment process of various nasal-sinus diseases, such as acute rhinitis (cold), chronic rhinitis, chronic sinusitis, allergic rhinitis, adenoid hypertrophy, dry rhinitis, vasomotor rhinitis, nasal septal deviation, nasal polyps, fungal sinusitis, etc. Nasal rinses are widely used with saline because of the following characteristics: 1) it is isotonic with the mucosa of the nasal cavity and can avoid dehydration and drying of the mucosa; 2) it is clinically available in high quantity and can be obtained from the local hospital with a prescription; 3) it is not irritating to the mucosa of the nasal cavity. What is the principle of using saline for nasal rinse treatment? 1. Sterilization of warm saline: Through the sterilizing effect of warm saline, bacteria and allergens in the nasal cavity are killed, eliminating germs and helping to reduce inflammatory symptoms. 2, help restore the nasal environment: the temperature and concentration of warm salt water is similar to human body fluids, which can effectively help restore the nasal cavity to a normal physiological environment. The frequency of the pulsating water flow is close to the normal oscillation frequency of the nasal cilia, which can gradually help restore the normal oscillation of the nasal cilia. 3.Clean the nasal cavity: through the water flow, the crusts (commonly known as boogers) and secretions and other substances that block the nostrils are flushed out directly from the nasal cavity, so that the nasal cavity is clear and breathing is smooth. 4.Soothe nasal muscles: pulsating water massage will soothe nasal muscles and improve nasal blood circulation. 5, repair edema: saline can play a good role in repairing the swelling and edema of the nasal tissue, thus eliminating the swelling and edema and effectively soothing the symptoms of nasal congestion. However, not all rhinitis are suitable for nasal rinsing with saline. For example, in severe nasal turbinate hypertrophy and other organic lesions, nasal rinsing with saline can only control further hypertrophy, but cannot eliminate the hypertrophy that has already formed, and surgery is needed to treat the hypertrophy. Nasal rinsing with saline is very effective for allergic rhinitis, sinusitis, simple chronic rhinitis, dry rhinitis, drug rhinitis, and atrophic rhinitis. Nasal rinsing with saline is a purely physical therapy without any side effects, and pregnant women and children can wash their noses without worry. However, compared to drugs and surgery, the effect is slow. Therefore, you need to insist on it. Normally, it will take 1-3 months to work. After the relief of rhinitis can be changed to 1-2 times a week to maintain the nose can be.