What is pulmonary edema?
Pulmonary edema is the buildup of fluid in the lungs. It usually occurs when the heart does not pump blood through the body properly. Pulmonary edema can also be caused by another disease, such as liver or kidney failure. It can also happen at high altitudes, from a poisoning, or as a result of a nonfatal drowning.
If you have fluid in your lungs, you may have trouble breathing, be restless, have a fast heart rate, or cough up foamy pink fluid. Breathing problems may be worse when you lie down.