Emphysema - Symptoms and causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/emphysema/symptoms-causes/syc-20355555
WEBApr 28, 2017 · Emphysema is a lung condition that causes shortness of breath. In people with emphysema, the air sacs in the lungs (alveoli) are damaged. Over time, the inner walls of the air sacs weaken and rupture — creating larger air spaces instead of many small ones. This reduces the surface area of the lungs and, in turn, the amount of oxygen that ...
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