There is no harm in rinsing the nose with saline, but if it is not done properly, it may induce an infection. Saline rinse nose for assisting in the treatment of sinusitis, rhinitis has a certain role, can be rinsed out of the nasal secretions, thereby inhibiting the growth and reproduction of bacteria, and can alleviate the symptoms of nasal congestion, for the treatment of nasal inflammation has a certain role, and there is no harm. Most of the hazards of saline rinse nose, are due to improper operation, such as rinsing too hard, may damage the nasal mucosa, causing local congestion, edema, thus inducing infection; or excessive rinsing, changing the normal nasal microenvironment, secondary infection. Saline rinsing is a routine means to assist in the treatment of nasal inflammation, the correct operation of the general harmless, be sure to follow the doctor’s instructions for the correct rinsing of the nasal cavity, to avoid damage to the mucosa of the nasal cavity, induced infection.