Nasal hygiene refers to the practice of keeping the nasal passages clean and clear to promote better breathing and overall health. This can involve techniques such as nasal irrigation, where saline solutions are used to flush out mucus and allergens, helping to reduce congestion and prevent infections. Maintaining good nasal hygiene can also involve avoiding irritants like smoke and pollutants, as well as using a humidifier to keep the air moist. Regularly cleaning the nose can help reduce the risk of conditions like sinusitis and improve the effectiveness of the immune system in the respiratory tract.