I have a soft fluid type lump on my knee cap. It is painless, goes up and down and I have had it for about a year. I can push it around and as I say, some days its bigger than others. If it is down, I can feel hard lumps underneath on my knee cap which are not on the other leg. Its only on my left leg. I have had a look at the symptoms of bursitis, but I am sure its not that as my father had that and it was completely different. Its not red, hot or swollen, but just this fluid type squashy mound! I am a 51 year old lady, fairly fit apart from Glaucoma, and I am having investigations at present for neurological symptoms which I have had on and off for some years.