In excess of a month ago, I fell on my left shin/tibia with the full force of my body weight hitting the edge of the floating dock. Broke the skin a bit, ankle swelled a bit and bruising mostly around the the ankle. Now I have have a lumb about the size of a medium marble on the shin. I would not dare touch the shin. Not even with a razor. Now tender if bumped or press applied directly. I'm still skittish with it at times. My knee seems to ache more. Often after sitting a bit, and I stretch, it feels like something is being pulled away inside. Kind of like a scab if it's on a area that when flexed stretches out the skin. Not painful but certainly noticeable. Should I be conderned? tendons/ligaments trying to adhere to the bone? Bone chipped? I'm able to run, cycle, row... Will lumb go away. This looks like I have some sort of tumorous growth on my shin.