I become short of breath while walking. Why does this happen?

I become short of breath while walking. Why does this happen?

Anything that causes lack of oxygen in the bloodstream can cause shortness of breath. Heart causes, such as angina, are a lack of oxygen supply to the heart, and that needs extensive medical assessment and treatment. Shortness of breath as a result of respiratory problems can range from illnesses such as asthma, which is a result of narrowing of the bronchial tubes, and infections causing bronchitis or pneumonia. There are other more complicated causes within the lungs that cause inflammatory conditions of the lung tissue (which we might call olvualytis) are nowadays extremely important - emphysema or chronic bronchitis, and obviously the blood disorders or anything causing a blood disorder. This might cause significant anaemia and might also cause shortness of breath usually associated with extreme tiredness.