Your doctor will diagnose pneumonia based on your medical history, a physical exam, and test results. Sometimes pneumonia is hard to diagnose because your symptoms may be the same as a cold or flu. You may not realize that your condition is more serious until it lasts longer than these other conditions.
During your physical exam, your doctor will check your temperature and listen to your lungs with a stethoscope.
If your doctor thinks you have pneumonia, he or she may do one or more of the following tests.
If you are in the hospital, have serious symptoms, are older, or have other health problems, your doctor may do other tests to diagnose pneumonia.