Hi, I am 23 years old. 7 years ago I fell down from my bicycle and got my top of the knee cut, the cut was deep, seemed it needed a stitch. There was significant amount of blood loss. Although my father bandaged it with betadine solution and the bleeding was stopped without any stitch. Within a month I was ok. But since then I feel a movable circular thing on that knee. It is very small. Doesn't even fit my fingertip. Maybe even less than 1 cm in size. It has neither grown in size, neither has bled, not hard, neither has caused any pain. I have played football volleyball cricket after that so much, fell down on that knee multiple times but it has shown no problems. 7 years since then, it is still the same. Sometimes gets lost, and only can be felt while sitting and using a finger, not visible from outside. I used to play with it all these years until today when I read an article about skin cysts and lumps. That made me anxious. Is this anything of concern? Or shall I immediately see a doctor? Please help!