It's a result of when the heart is deprived of oxygen due to a lack of blood supply, which causes pain in the chest and, sometimes, the left arm. Angina feels like a "squeezing, pressure, or dull ...
Some other lung-related conditions known to cause chest discomfort include: Pneumonia: This infection inflames the air sacs in your lungs and can make your chest hurt when you breathe or cough.