i am 21 and when i was 15 i devoloped a lump behind my knee which you could see stick out at the back. as time passed it got bigger and i a started getting lots of fluid on my knee , filling up every week twice the size as the other one. since then i have had key hole surgey three times and a major operation to remove the six inch bursa from my knee. This this date which is 10/02/05 my knee problem has started again on the same knee with another lump and lots of fluid and bad pain all in my leg. any with any advise or ideas