This method of rinsing the nose with lukewarm saltwater is an easy and gentle way of removing crusts and foreign particles from the nasal passages. It’s simple to do and has no harmful side effects. It has proved to be highly effective in the prevention and treatment of sinusitis, and is also a useful component in the treatment of chronic sinusitis. Those suffering from pollen and dust allergies may in many cases reduce their symptoms by practising nasal cleansing.