Hello. I've just been diagnosed with a Baker's cyst. I first became aware of it whilst I was driving. Later on inspection, I noticed a swelling at the bad of my leg behind my knee. It is achey and very painful at the moment and much to my annoyance, cannot do much exercise as it hurts too much.
I am using some painkilling/anti-inflamatory gel from the dr, but if it doesn't work, have to have a scan and possibly drainage and or surgery.
Have you got a lump? It sound's like a Baker's cyst, but to be sure, visit your gp.