Breathing problems are experienced by so many people of any age, gender, or economic status. Whatever diagnosis you may have, it is very important for you to understand the nature of your breathing condition. This is a very important thing for you to do so that you may be able to pursue a very productive life. There are many causes of breathing problems. It may be caused by an overproduction of secretions brought about by the allergic irritation and the viral or bacterial infection. Chronic obstructive pulmonary diseases (COPD) such as asthma, emphysema, sinusitis, bronchitis, pneumonia, tuberculosis, and lung cancer are some of the common causes of breathing difficulty. The inflammation brought about by these conditions is mainly the cause of the blockages of the air passages.