It started with just an ache Friday evening when I coughed or moved quickly. Now I can barely move (think knife between your ribs). Caused by lung infections among other things, go figure. Solution: Ibuprofen unless you turn cyatic (blue) from lack of oxygen due to shallow breathing because it hurts. Really. Then you need to go to the doctors. What am I talking about? Just another chapter...
One layer of the pleura overlies each lung. The other layer lines the inner chest wall. The two layers of pleura are like two pieces of smooth satin rubbing against each other with almost no friction, allowing your lungs to expand and contract when you breathe without any resistance from the lining of the chest wall.
When inflamed, the two layers of the pleural membrane in the affected side of your chest rub against each other like two pieces of sandpaper, producing the pain of pleurisy when you inhale and exhale...or cough, or sneeze, or blow your nose, or roll over at night, or laugh...