<P> A doctor uses a stethoscope to listen to the breathing . This method detects any unusual sounds in the lungs . A person with pleurisy may have inflamed layers of the pleurae that make a rough, scratchy sound as they rub against each other during breathing . This is called pleural friction rub . </P> <P> Depending on the results of the physical examination, diagnostic tests are sometimes performed . </P> <P> A chest X-ray takes a picture of the heart and lungs . It may show air or fluid in the pleural space . It also may show the cause (e.g., pneumonia, a fractured rib, or a lung tumor) of the pleurisy . </P> <P> Sometimes an x-ray is taken while lying on the painful side . This may show fluid, as well as changes in fluid position, that did not appear in the vertical x-ray . </P>

Sharp pain in back when i breathe in