Confined emphysema is generally a non-serious condition, as the vast majority of confined emphysema has no clinical symptoms and minimal effects on the body. Emphysema is a pathologic change that occurs when the elasticity of the lung tissue decreases, resulting in over-expansion and an increase in air content. Confined emphysema means that the lung tissue in which emphysema occurs is very limited, confined to certain parts and a certain area, so confined emphysema will mostly not cause any symptoms in the human body, and it will not lead to fever, nor will it lead to coughing, coughing up sputum, chest tightness, or shortness of breath. If limited emphysema is combined with infection, clinical symptoms can appear, but only need to give active anti-infection treatment, most can be cured, so limited emphysema is clinically very light.