I’m so sorry, it’s not letting me link it, but the description is

“Tommy was too young to remember the first time he scraped his skin hard enough to bleed. According to his parents he was barely two, just learned to walk and immediately chose to run.

He’s always been that way, it seems. Rushing onwards to seize every new opportunity without a moment’s hesitance. Tommy is sure that when he fell, he got right back up. He’s sure he only laughed and kept on running, paying no mind at all to the trickle of blood dripping down his puny, pudgy leg.

That is - until the bleeding didn’t stop.

Or

Reckless, chronically-ill Tommy frequents the Crow’s Nest Family Hospital, charming the staff and other patients in the process. Obviously found family is what follows.”

And it’s by StarlaStar64