Pleural effusion? I have great and original lungs for a CFer so I notice things when they go screwy. Pleural effusion is fluid caught between the pleural membranes. It seems like a kidney from its location when I have it too. And the bubbly, twitchy description is right on. Pleurisy involves a pleural membrane that is inflamed and sore that turns every breath into an adventure in pain. Pleurisy is mostly dry and the membranes can adhere causing tremendous pain but is less serious than the relatively painless pleural effusion. You need a layer of fluid for the lungs to move freely. When it accumulates, you've got a problem.
There's a good chance you have or had an infection that caused the pleural effusion. Mine is usually accompanied by hemoptysis, big blood clots that get coughed up. The last pleural effusion I had no pain excepting anything resembling a cough which was a new record for momentary pain.
The pleural effusion itself may not be serious but anytime fluid accumulates there's cause for concern. I strongly suggest you be seen by your doctor before the weekend. I'm certain that you are describing pleural effusion so use the term if you want a better description. Even if we are guessing wrong, your doctor will suspect it from your description. This could turn critical so watch for fever and go camp at your doctor's office.
Best luck,
LL
