When rhinitis occurs, especially allergic rhinitis, the use of saline rinses can cleanse the nasal cavity of inflammatory secretions and bacteria, and with the use of appropriate medication can usually achieve better results. Theoretically, there are no side effects when using saline to rinse the nasal cavity, but care should be taken when using it to gently heat the saline for nasal rinsing, so that the saline that is too cold or too hot does not irritate the nasal cavity and aggravate the condition, and the nasal rinsing should not be used too hard to avoid the water entering the middle ear and causing otitis media.