Nasal congestion in patients can be related to neocoronavirus or not related to neocoronavirus infection. Nasal congestion usually occurs with the exception of neocoronavirus infections, such as influenza, rhinitis, or colds. However, in addition to nasal congestion, neocoronaviruses have fever, cough, malaise, sore throat, or diarrhea. If the disease continues to worsen after three or four days, and there is difficulty in breathing, chest tightness, chest congestion, or coughing up phlegm, it is important to go to the hospital for a checkup, such as a viral test for the new coronavirus or a CT scan of the lungs. If the test is positive, it will be considered as a new coronavirus infection. If the condition gradually recovers after three or four days, consider it a cold or other rhinitis. Therefore, there is a correlation between nasal congestion and neocoronavirus, and there is a possibility of cross-presence, but nasal congestion does not necessarily mean that it is neocoronavirus pneumonia. Source: Dr. Yurai