With a cold, the mucus of the nose thickens. This impairs the nasal cilia movement that is needed for health. With irrigation, the thick mucus is removed and is replaced by thin saline. This allows the cilia to move again to defend the body. Pulsation moves the cilia back and forth, which helps restore normal movement of the cilia.
Warm saline encourages blood flow to the sinus and nasal passage linings.
Anyone can irrigate their own sinuses. The Grossan Sinus Irrigator uses very low pressure. This makes irrigating pleasant and easy, avoiding any uncomfortable sensation of pressure in the head. I find that my patients readily treat themselves, and are less likely to skip treatments than with other methods.