What causes lump right below inner knee and bruises on thighs?
Patient: I know that I have a cyst behind my kneecap as I've had tests done before so my right knee is often a little sore, however this time it's more sore than it's ever been I can't bend it all the way or straighten it without pain, and it feels like there's a lump right below my inner knee where my calf connects, also I'm now noticing some bruises forming on the inside of my thigh at the top of my knee that are very dark blue with darker purple spots.  What could be wrong and is it serious? Doctor: HIThank for asking to HCMI really appreciate your concern, this could be  popliteal cyst at least can be said what the history given here, if this is popliteal cyst then you have to remove this and for that better to consult the surgeon, hope this information helps you take care and have good day.