Leaving hospital does not mean the lungs have already returned to normal. A person may still become breathless on the stairs, tire after a shower, or cough up mucus for some time after treatment begins. Pneumonia inflames the alveoli, the small air sacs where oxygen moves into the bloodstream.
As the inflammation settles, these areas may gradually work more effectively, but recovery is not always even from one day to the next.
The cause of the infection, its severity, age, general health, and existing heart or lung disease can all affect the pace. The discharge letter and medication instructions provide a useful starting point for tracking what was expected and what needs review.



