Note: I know this is the wrong place to post this, but I couldn t find anything else :/ I m 15 years old, and I found a softish bump on my knee cap. It showed up a year or two ago, and I never think about it, because it usually doesn t hurt. I kneeled on it today and it hurt a tad bit, so I squeezed it, and it popped. That s happened twice. And it started to bleed, so I knew I was done with it. The puss looked like it was just an infection. But if you do know what it is, please help me. I m pretty worried :)