Feeling stuffy in the wintertime is a very common occurrence. Nasal congestion is a very common illness symptom associated with mild viral infections like colds, COVID-19 and the flu. It can also be triggered by allergies and environmental changes. In some cases, a case of simple nasal congestion can turn into a more serious secondary infection called a sinus infection, which can cause severe congestion, and sinus pressure or facial pain. Keep reading to learn ...