Someone mentioned bakers cyst on a post about painful knees. I have painful knees too, especially on the outside of the knees. BUT just this past month I've discovered a lump on the lower back side of my right knee. I looked up bakers cyst and wonder if this is what I have. I have a dr. appt. that I hope to remember to ask the dr. about this lump later this week. Anyway, I was wondering if a bakers cyst is something that many Fibro sufferers have? Does anyone know?