Congestion is a common symptom that we have all suffered from. It makes it hard to breathe and can interrupt day-to-day life. With cold and flu season among us, how do you combat congestion fast? Learn about the causes and treatment options for congestion. Visit AFC Urgent Care Arvada for illness diagnosis & treatment this winter. Common Causes of Congestion Congestion occurs due to excess mucus building up in the sinuses. Our bodies naturally produce mucus ...