A blocked nose is caused by nasal congestion. There are many reasons why nasal congestion can occur. The first one, the symptoms of cold and fever, it is easy to cause the symptoms of runny nose and nasal congestion. The second one, consider the inflammation of the nasopharynx. Chinese medicine speaks of nasal abscess, causing pus and impassability. The third consideration is sinus inflammation, septic sinusitis, or rhinitis can cause the nose does not pass, especially chronic inflammation of the nasopharynx, there will often be symptoms of lying down at night without ventilation. If it is a cold, we can take medicine for cold. If it is sinusitis, you can take a sinus examination to see if there is inflammation, you can symptomatic anti-inflammatory.