I noticed this bump under my knee like one week ago, and i didn't think much of it so i basically forgot about it. That was until my family noticed it and i got a closer look at it. It's located under my knee on the left side and its 2 cm wide and 3 cm long. I don't feel any pain (the main reason i forgot about it) and its kinda hard on the touch but it seems like it can move a little bit. I've been driving a bicycle for like 2 months now non-stop. The only time when i feel something is when i close my leg together and it just feels uncomfortable.