You have pain in your chest. Your doctor has told you that you have pleurisy (pleuritis). Pleurisy is swelling (inflammation), irritation, or infection of the pleura. The pleura are two layers of thin, smooth tissue that surround the lungs and line your chest wall.
Pleurisy occurs when inflammation affects the pleura. Normally, there is a small amount of fluid in between the pleura. This fluid helps the pleura move smoothly past each other when you breathe in and out. But when you have pleurisy, the swollen pleura rub against each other when you breathe. This is very painful.