After being in hospital having a plurel effusion, doe to fluid in 1 lung and heart area, what would cause different types of pain in those areas?

Some ideas: Without an actual examination, I cannot give specific medical advice on your particular health. Pneumonia causes inflammation and pain. Also, the inflammation can keep someone from being able to fully exhale and have lungs overinflate. Air or Fluid pressing on an area can cause pain but not as common as inflammation. There can be scarring and deformity after a pneumonia but this is rather RARE.

MANY possibilities: After effusions, you can have leftover inflammatory pain. You can have pain from the heart's surrounding fluid, separate from the pleural effusion (pericardial effusion). Hiatal hernias can cause pain, which can be difficult to distinguish from other causes. There is a possibility of angina if you have coronary artery disease. If your pains are get worse, see your doc, or an ER, straightaway!