Winter season is the season for a disease like common cold and flu. These later becomea common reason for problems like chest congestion.  Chest congestion is basically a term used for infection in which heavy fluid i.e; mucus, gets accumulated in the lungs because of the overproduction of the mucus membrane. The bacteria or virus irritates the membrane, which further leads to inflammation. The congestion gives you a feel of the heavy, tight chest in which a person cannot easily breathe.