Nasal congestion results from bacteria and viruses, allergens, and other pollutants in the environment around us. In fact, more than 90% of infection causing bacteria and irritants enter the body through the nose and thrive in the nasal passages. When viruses and other pollutants enter the nose, the body reacts by sending white blood cells to the lining of the nose and produces mucous to wash away irritants. Unfortunately, nasal congestion, swelling of nasal passages, and other nasal problems often result. As we blow our nose to alleviate nasal congestion, cough, and swallow phlegm, bacteria are forced into the ears, sinuses and throat.

Nasal congestion can lead to ear, sinus, and upper respiratory infection. Nasal congestion is also associated with headache, sore throat, and other unpleasant ailments. Nasal congestion can be avoided or at least reduced by regularly using a nasal spray. Most of us wouldn't go a day without washing our hands, at least a few times, but do nothing to flush away the harmful bacteria that lead to nasal problems. Although nasal sprays moisturise and keep the nose healthy, certain nasal sprays may lead to increased nasal congestion if overused.