Chronic bronchitis is when the lining of the bronchial tubes regularly becomes irritated and inflamed. One of the most common reason for chronic bronchitis is cigarette smoking and secondhand smoke. If you have a cough lasting longer than three months it could lead to breathing problems that can steadily get worse. Emphysema is having shortness of breath. Having a cough resulting from mucus or wheezing can be a early sign of having emphysema. Emphysema come on slowly it’s not a overnight diseases. Emphysema is worse for smoker and other folks who have other medical issues because it can make them unable to exercise. Asthma is a lifelong disease related to the airways in the lungs. The lungs become swollen and the muscles around the lungs
