Jan 19, Chest congestion is when mucus builds up in your chest, causing a cough. Get rid of chest congestion with these home remedies, natural. What should you do when a cold turns into bronchitis, also called a chest cold? Find out when But if a cough persists after the cold is gone, contact your doctor. Nov 13, Mucus buildup and coughing are also common with bronchitis. fever, tiredness, runny nose, chest congestion, chills, wheezing sounds when.