The condition of a blocked nose certainly makes you feel uncomfortable in your activities. Many causes that make you experience nasal congestion. Nasal congestion can occur when the tissue inside the nose is disturbed. Interference can be caused by irritation from breathing air pollution, either from vehicle fumes or exposure to cigarette smoke. Other causes of nasal congestion are allergies, sinusitis, and infections, such as ARI and influenza. When you get allergies or breathe dirty air, the membranes lining the nasal passages will become inflamed. That's when the nose produces mucus to expel everything that is disturbing. It is this mucus repellent that makes the nose become blocked. Causes of Nasal Congestion As mentioned above, the causes of nasal congestion vary. Here is a more detailed explanation: Cough and cold Complaints of coughs and colds often occur due to foreign bodies such as feces, infections or inflammation that occur in the upper respiratory tract, namel...